Question

Given f(x)=3x^2-2x, find f(a+1)

Answer 1

just replace each 'x' in the expression with 'a+1'

Answer 2

allow me to give an example :

f(x) = x^2 + 1

then f(2) = (2^2)+1=4+1=5

Answer 3

do it similarly .. as @asnaseer said :

put x = (a+1) and then solve

Answer 4

i did but idk how to square it... like do i do 3*a*^2 or what?

Answer 5

ok, so lets concentrate on just that part

Answer 6

\[\large{3(a+1)^2-2(a+1)}\]

can you tell what is (a+1)^2 ?

Answer 7

\[(a+1)^2=?\]can you do this?

Answer 8

this is the question know