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Mathematics 8 Online
OpenStudy (anonymous):

f(x)=-3+1 g(x)=-4x^2+x+2 Find g(f(x))

OpenStudy (anonymous):

did I do this right? -4x^2+x+2 -4(-3x+1)+(-3x+1)+2

OpenStudy (anonymous):

@Jhannybean @jim_thompson5910 @kirbykirby

OpenStudy (anonymous):

final answer 9x-1?

jimthompson5910 (jim_thompson5910):

f(x)=-3x+1 right?

OpenStudy (anonymous):

yup

jimthompson5910 (jim_thompson5910):

ok thx, one sec

jimthompson5910 (jim_thompson5910):

you forgot to square the first (-3x+1) term

jimthompson5910 (jim_thompson5910):

it should be this -4(-3x+1)^2+(-3x+1)+2

jimthompson5910 (jim_thompson5910):

then you expand that out and simplify

OpenStudy (anonymous):

o ur right my bad one sec

OpenStudy (anonymous):

-36x+21x-1 ??

jimthompson5910 (jim_thompson5910):

something is missing, what is it

OpenStudy (anonymous):

-36x^2+21x-1

jimthompson5910 (jim_thompson5910):

good

OpenStudy (anonymous):

ty ;)

jimthompson5910 (jim_thompson5910):

yw

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