Question

If f(x) = x²+3x+1, what is f(x+2)?

A. x² + 3x +3
B. (x+2)²+3(x+2)+1
C. (x+2)(x²+3x+1)
D. x²+3x+9

Answer 1

B

Explanation:

f(x)=x^2+3x+1

f(x+2)=(x+2)^2+3(x+2)+1

f(x+2)=(x+2)(x+2)+3x+6+1

x^2+2x+2x+4+3x+7

x^2+4x+3x+11

x^2+7x+11