SOLUTION: Find (fog) (x) if f(x)=x^2-1 and g(x)3x+5

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Question 38531:
Find (fog) (x) if f(x)=x^2-1 and g(x)3x+5
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
ok... +f%28x%29+=+x%5E2+-+1+ and +g%28x%29+=+3x%2B5+

so +fg%28x%29+=+f%283x%2B5%29+ and hence we get
+fg%28x%29+=+%283x%2B5%29%5E2+-+1+ which is an answer. What you can do is expand the bracket and simplify. But the question doesn't ask you to simplify :-)

jon.