138k views
4 votes
If f(x) =
(3+x)
(x-3)
what is f(a + 2)?

User Elmir
by
6.2k points

1 Answer

5 votes

We have f(x)=(3+x)(x-3)=3x-9+x²-3x=x²-9

So f(a+2)=(a+2)²-9=a²+4a+4-9=a²+4a-5

User Vitor Villar
by
7.5k points
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