Question

If f(x)=x²+3x+5, what is f(3+h)?

A.) h²+h+23
B.) h²+9h+23
C.) (3+h)²+8+h
D.) (x²+3x+5)(3+h)

Answer 1

The answer is B.

Explanation:

Answer 2

You have to substitute 3+h for x, then work out the equation.

(3+h)^2 + 3(3+h) + 5 = 9 + 6h + h^2 + 9 + 3h + 5 =

h^2 + 9h + 23

Answer B.