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

User Kgriffs
by
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2 Answers

6 votes
(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
User Monstr
by
8.8k points
3 votes
(fg)(x)=f(g(x))=4(g(x))²-5=4(x+3)²-5=4x²+24x+31
User Duttaoindril
by
7.6k points
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