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Algebra 15 Online
OpenStudy (anonymous):

factor the trinomial 12x^2y^2+11xy^2-15y^2

OpenStudy (smilewithmehun):

\[12x^2y^2+11x^2-15y^2\] Okay so first you want to multiply the first and last number So 12 times -15 = -180 -180 is your product. The 11 is your sum. So you use trial and error to find two numbers that when multiplied equal -180 and when those same two numbers are added they equal 11.

OpenStudy (smilewithmehun):

If you can't figure it out in a few minutes I'll give you the answer but at least try first please.

OpenStudy (anonymous):

your missing part of the problem^^

OpenStudy (anonymous):

first you take out y^2 so you have y^2(12x^2+11x-15) and factor that like she said

OpenStudy (smilewithmehun):

Ah yes :p I had that written on my paper just forgot to type it up lol

OpenStudy (anonymous):

ey do you guys want me to present the answer choices if that helps your answer

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

if you have choices why dont you foil them to see if you end up with the equation

OpenStudy (anonymous):

a) (3x+5y)(4x-3y) b)y^2(x+5)(12x-3) c)(4x+5y)(3x-3y) d)y^2(3x+5)(4x-3)

OpenStudy (smilewithmehun):

I agree with @bannemohr you could just FOIL the answers to find which is correct. Do you know how to do that? I'll give you a hint though, the answer is either B or D

OpenStudy (anonymous):

im thinking its b

OpenStudy (smilewithmehun):

Foil it and check..

OpenStudy (anonymous):

foil it and find out

OpenStudy (anonymous):

wat does foiling something mean. im new to this

OpenStudy (anonymous):

ok (x+5)(12x-3) you multiply x with the 12x to get 12x^2 then multiply the 5 with the 12x to get 60x then multiply the x and -3 to get -3x and lastly the 5 and -3 to get -15 so it would be 12x^2+60x-3x-15 then combine like terms

OpenStudy (anonymous):

its d

OpenStudy (smilewithmehun):

FOIL is First Outside Inside Last so say you have (4x+2)(5x+6) you would do First multiply 4x times 5x to get 30x^2 Then Outside 4x times 6 = 24x Then Inside 2 times 5x = 10x Then Last 2 times 6 = 30 and put the positive or negative signs in between so for this example equation you would get 30x^3 + 24x + 10x + 30

OpenStudy (anonymous):

yea I understand

OpenStudy (anonymous):

have anymore problems you can message me

OpenStudy (anonymous):

ok

OpenStudy (clalgee):

Welcome to Openstudy!

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