Question

Please Help
Given the function f(x)=x^2+2x+1, find:
f(2b)

Answer 1

f(2b) = 4b^2 +4b +1

Explanation:

Put 2b where x is and simplify.

f(2b) = (2b)^2 +2(2b) +1

f(2b) = 4b^2 +4b + 1