SOLUTION: Let f(x)=x^2-1, evaluate the following f(a)−3

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Question 634990: Let f(x)=x^2-1, evaluate the following
f(a)−3
Answer by jsmallt9(3759) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=x%5E2-1
This tells us that the function named "f" takes whatever input you give it (here represented by "x") and squares it and then subtracts 1. This function f will square any input and then subtract 1.

f(a) is what you get from f when you give it an input of "a". And what does f do to its input? Answer: It squares it and then subtracts 1. So:
f%28a%29+=+a%5E2-1

For f(a)-3 we just take f(a) and then subtract 3:
f%28a%29+-+3+=+%28a%5E2-1%29+-+3+=++a%5E2+-+4