07172017, 02:27 PM  #1 
Ten Point
Join Date: Oct 2006
Location: Lake Jackson

Math whiz?
My son is taking college algebra and he has a problem that I just can't seem to figure out. (I hate math!)
5X^2 +17X +20 Factoring USED to be the one thing I was good at but it has been more years that I care to admit. 
07172017, 02:29 PM  #2 
Pope & Young
Join Date: Sep 2009
Location: Lake Jackson
Hunt In: The Grocery Store...

nevermind. I wasnt thinking

07172017, 02:31 PM  #3 
Ten Point
Join Date: Oct 2009
Location: Kerrville
Hunt In: Texas

That gives me a headache just looking at it. I can barely remember the order of operations and to balance the equation. I can not however remember how to do it all though....

07172017, 02:33 PM  #4 
Pope & Young
Join Date: Apr 2007
Location: Alvin, Texas
Hunt In: The Red Dirt Area In Doss, Texas!

Pi R round, Cornbread R Square

07172017, 02:41 PM  #5 
Ten Point
Join Date: Oct 2006
Location: Caldwell, Texas

Are you wanting it factored?

07172017, 02:44 PM  #6 
Ten Point
Join Date: Oct 2006
Location: Lake Jackson

yes. As far as I can tell it isn't possible to factor with these numbers.

07172017, 02:47 PM  #7 
Ten Point
Join Date: Nov 2010
Location: Funky Town
Hunt In: Coleman County

Google Quadratic Formula

07172017, 02:50 PM  #8 
Ten Point
Join Date: Aug 2014
Location: North Carolina
Hunt In: NC, SC

use the quadratic equation to solve. x=(−bą√(b2−4ac))/2a

07172017, 02:51 PM  #9 
Eight Point
Join Date: Feb 2017
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Hunt In: Duval County

If it's asking to solve by factoring, it cant be done with rational numbers. In other words, "there are no like terms". That 17 is trouble factorwise. Maybe a mistype? If it's asking to solve with the quadratic formula, it gets some funky numbers as well.
Quad Formula: x = {b +/ [sqrt(b^2  4ac)]} / 2a where ax^2+ bx + c = 0. Solve for both X's (+/) and plug into original formula.? Someone correct me if i'm wrong. A bit rusty. 
07172017, 02:52 PM  #10 
Nubbin' Buck
Join Date: Apr 2015

You can't really factor this completely but...
Take the x out and get x(5x+17) + 20 or.. (5x2)(x+3) + 26 
07172017, 02:53 PM  #11 
Nubbin' Buck
Join Date: Apr 2015

Quadratic formula is if the equation is equal to 0. This equation is not equal to 0 and you are not solving for x. Just simply factoring.

07172017, 02:53 PM  #12 
Ten Point
Join Date: Sep 2012
Location: Tyler
Hunt In: Cherokee Co.

My TI89 tells me "Too few arguments"! What are you solving for?
If it's factoring... (5x^217x20) Last edited by jlinville; 07172017 at 02:57 PM.. 
07172017, 02:59 PM  #13 
Ten Point
Join Date: Oct 2012
Location: austin
Hunt In: Gillespie, San Saba & Kerr primarily

what's the problem?
If you set it equal to zero the roots are 4.32 & 0.92. 
07172017, 03:00 PM  #14 
Eight Point
Join Date: Feb 2011
Location: Ponder
Hunt In: Llano, KS, IA, MO

Graph it and find the 2 points it crosses the XAxis. Those 2 points are the "zeros" of the factor and function.
https://www.desmos.com/calculator 
07172017, 03:00 PM  #15 
Nubbin' Buck
Join Date: Apr 2015


07172017, 03:00 PM  #16 
Nubbin' Buck
Join Date: Apr 2015

Its factoring people, not solving.

07172017, 03:04 PM  #17 
Pope & Young
Join Date: Aug 2009
Location: Montgomery
Hunt In: South Texas

Google......
Be gettin' a work out in this thread... 
07172017, 03:06 PM  #18 
Ten Point
Join Date: Dec 2012
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Hunt In: San Angelo/ Any public land

(5x^217x20)

07172017, 03:06 PM  #19 
Ten Point
Join Date: Oct 2006
Location: Caldwell, Texas

So her is what my wife the math major came up with.

07172017, 03:13 PM  #20 
Ten Point
Join Date: Nov 2010
Location: Funky Town
Hunt In: Coleman County

Actually, the OP didn't clarify if the problem was asked to be factored or solved.
But in reality, solving and factoring are oneinthe same in that they simply put the original equation in a format to allow the user to find the numerical solutions for the variable. The difference is semantic and only teachers and people interested in theory care for the difference between the two. 
07172017, 03:17 PM  #21  
Nubbin' Buck
Join Date: Apr 2015

Quote:


07172017, 03:18 PM  #22 
Pope & Young
Join Date: Jan 2012
Location: Savoy, Texas
Hunt In: Fannin/Grayson/Erath

No thanks, I've done enough thinking for the day.

07172017, 03:20 PM  #23  
Ten Point
Join Date: Sep 2012
Location: Tyler
Hunt In: Cherokee Co.

Quote:
brought back what I learned ~30 years ago. TO check him, multipy what's in parenthesis FOIL First  (15x) Outside (5x^2) Inside  (6) Last  (2x) = 5x^2+15x+2x6(+26) = 5x^2+17x+20 

07172017, 03:20 PM  #24 
Ten Point
Join Date: Oct 2006
Location: Lake Jackson

Actually, the OP didn't clarify if the problem was asked to be factored or solved.
But in reality, solving and factoring are oneinthe same in that they simply put the original equation in a format to allow the user to find the numerical solutions for the variable. The difference is semantic and only teachers and people interested in theory care for the difference between the two. Post #5 I was asked it I wanted it factored. Post #6 I answered yes. Still I'm going to send him off to the math tutor to find out how his prof. wants this done. 
07172017, 03:20 PM  #25 
Pope & Young
Join Date: Sep 2014
Location: Needville
Hunt In: Fort Bend, Gillespie

Beer me

07172017, 03:21 PM  #26 
Ten Point
Join Date: Oct 2006
Location: Lake Jackson

Thanks for all the help. Now I have a headache and need to lie down.

07172017, 03:22 PM  #27  
Nubbin' Buck
Join Date: Apr 2015

Quote:
I bet you a bag of pea gravel I'm right. Last edited by dbenn454; 07172017 at 03:23 PM.. Reason: * 

07172017, 03:24 PM  #28 
Ten Point
Join Date: Sep 2012
Location: Tyler
Hunt In: Cherokee Co.


07172017, 03:29 PM  #29 
Pope & Young
Join Date: Oct 2006

I could tell you but than neither one of you (or the rest of TBH) would know how to solve the equation in the future.

07172017, 03:30 PM  #30 
Pope & Young
Join Date: Oct 2006

Sorry...I forgot the in my previous ramblings.
Is this that new skooling they be doing nowadays 
07172017, 03:31 PM  #31 
Pope & Young
Join Date: Nov 2011
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Hunt In: Crowell

3

07172017, 03:32 PM  #32 
Pope & Young
Join Date: Oct 2006
Location: Cypress, TX
Hunt In: Lavaca, Kimble and Colorado Counties

purple!

07172017, 03:35 PM  #33 
Pope & Young
Join Date: Oct 2006

iffin it was a multiple choice question I'd pick C unless D was all of the above, than I'd most "defiantly" choose D

07172017, 03:38 PM  #34 
Pope & Young
Join Date: May 2010
Location: Bryan
Hunt In: anywhere

Omg....I'm going back to the wgi feeder thread. I have no business here.

07172017, 03:57 PM  #35 
Ten Point
Join Date: Sep 2013
Location: 3rd Coast
Hunt In: Batson, Gulf Coast, Wyoming....

7

07172017, 04:02 PM  #36 
Pope & Young
Join Date: Oct 2012
Location: Bastrop
Hunt In: SABINAL, Sonora, Bastrop, Carrizozo NM

That reminds me of why College Algebra II was the only class I ever dropped in school. I hate that sheet.

07172017, 04:26 PM  #37 
Pope & Young
Join Date: Oct 2006

X=20/37

07172017, 05:03 PM  #38 
Ten Point
Join Date: Oct 2006
Location: Salado, Texas
Hunt In: Mills County

This is why I got into sales.
No maths 
07172017, 05:31 PM  #39 
Ten Point
Join Date: Oct 2006
Location: Lake Jackson


07182017, 11:33 PM  #40 
Ten Point
Join Date: Oct 2014
Location: pflugerville
Hunt In: anywhere freinds will take me and granger phl

I don't remember much from college but I believe this is acceptable to forget
Sent from my SAMSUNGSGHI337Z using Tapatalk 
07182017, 11:48 PM  #41 
Pope & Young
Join Date: Oct 2006
Location: Hamshire, Texas
Hunt In: Real County, Chambers County, Kansas, Wyoming, Montana, New Mexico, Nebraska

WTH is that? I'd have a better chance of translating Mandarin Chinese then solve that!

07182017, 11:55 PM  #42 
Four Point
Join Date: May 2010
Location: Out of a tent
Hunt In: Rolling Plains/East Texas

This is why I absolutely hate math.
Sent from my SAMSUNGSMG891A using Tapatalk 
07182017, 11:56 PM  #43 
Ten Point
Join Date: Oct 2009
Location: White Settlement, Tx
Hunt In: Pleasanton, Public land

Yall gave me a headache

07192017, 12:16 AM  #44 
Ten Point
Join Date: Nov 2016
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07192017, 12:22 AM  #45 
Ten Point
Join Date: Mar 2014
Location: Houston
Hunt In: Texas

Huh, i thought the only college algebra course was linear algebra. Wait til your kid takes partial differential equations and asks you about laplace transforms. Your brain will explode

07192017, 06:25 AM  #46 
Pope & Young
Join Date: Feb 2013
Location: Van,TX
Hunt In: Mc Culloch County since 2015 Van Zandt County since 2017

Mexican Cornbread ;) Some one said purple. I'd have to agree. Here's how I arrived at it ;) 
07192017, 07:13 AM  #47 
Pope & Young
Join Date: Oct 2006
Location: Allen, TX
Hunt In: Where ever I get a chance.


07192017, 07:37 AM  #48  
Ten Point
Join Date: Dec 2013
Location: Belton

Quote:


07192017, 07:49 AM  #49 
Ten Point
Join Date: Aug 2008
Location: San Antonio, TX
Hunt In: Mason, TX; Doss, TX

The function doesn't factor 'evenly'. Use the quadratic formula as others have said and you'll come up with your two solutions. See post #9...BHD has it right.

07192017, 09:39 AM  #50 
Eight Point
Join Date: Jan 2013
Location: Louisiana
Hunt In: Louisiana/South Texas

Holy xxit. I have no business in here either. I have never even seen such as this. I'm out

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