Question

What are the x-intercepts of the function f(x)=(x + 1)(x + 4)?

Answer 1

Answer:

B

Step-by-step explanation:

To find the x- intercepts let f(x) = 0 , that is

(x + 1)(x + 4) = 0

Equate each factor to zero and solve for x

x + 4 = 0 ⇒ x = - 4

x + 1 = 0 ⇒ x = - 1

The x- intercepts are (- 4, 0 ) and (- 1, 0 )

Answer 2

B because x =-1 and -4 make f(x)=0