Question

if f(x) = 3-x^2, find f(3a)
explain please (:

Answer 1

3-9a^2
3(1-3a^2)

Answer 2

Explain...well all you do is plug in whats in the parenthesis, which is "3a" into the x value.
So,
3-(3a)^2
And then look at what I posted above.

Answer 3

im stuck on 3- (9a)
do i distriibute the negative sign to the 9a?

Answer 4

You can just take common when you have 3-9a^2
3 is a common factor.

Answer 5

so the answer comes up as....3a?
(sorry im having a hard time!)