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3 years ago

Given f(x)=4x^2−5 and g(x)=x+3 . What is (fg)(x) ?

Mathematics

2 answers:

zmey [24]3 years ago

4 0

(fg)(x)=f(g(x))=4(g(x))²-5=4(x+3)²-5=4x²+24x+31

Yuki888 [10]3 years ago

4 0

(fg)(x) = f(g(x))
= 4(x+3)^2 − 5
= 4(x^2 + 6x + 9) - 5
= 4x^2 + 24x + 36 - 5
= 4x^2 + 24x + 31

answer
(fg)(x) = 4x^2 + 24x + 31

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