Andrew M. answered • 09/20/17
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
f(x)=3x-2 and g(x)=x^2+3x+1
find (gof)(x)
(gof)(x) = (3x-2)^2 + 3(3x-2) + 1
= 9x^2 - 12x + 4 + 9x - 6 + 1
= 9x^2 - 3x -1
= 9x^2 - 12x + 4 + 9x - 6 + 1
= 9x^2 - 3x -1
It may be easier to look at (gof)(x) as g(f(x)) = g(3x-2)
Clare C.
Yep thank you I understand the part I kept tripping up on was that I didn't know you were supposed to replace both x in x^2+3x+1
so thanks I got it now
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09/20/17
Andrew M.
09/20/17