Question

What are the x-intercepts for the function f(x)=x2 + 2x - 15?

A.
(0,-5), (0,3)

B.
(0,5), (0, -3)

C.
(5, 0), (-3,0)

D.
(-5,0), (3,0)

Answer 1

D)
`(-5,0),(3,0)`

Explanation:

`f(x)=x^2+2x-15\\\\0=x^2+2x-15\\\\0=(x+5)(x-3)\\\\x=-5,x=3\\\\(-5,0),(3,0)`