SOLUTION: I need help perfoming the indicated operation f(x)=x+2 g (x)=x2-1 I need to find (g of)(x)

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Question 127193: I need help perfoming the indicated operation
f(x)=x+2 g (x)=x2-1
I need to find (g of)(x)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Remember, (g o f)(x) means g(f(x))

g%28x%29=x%5E2-1 Start with the second function


g%28f%28x%29%29=%28x%2B2%29%5E2-1 Plug in f%28x%29=x%2B2+. In other words, replace each x in g(x) with x%2B2


g%28f%28x%29%29=x%5E2%2B4x%2B4-1 Foil

g%28f%28x%29%29=x%5E2%2B4x%2B3 Combine like terms