Question

What are the zeros of f(x) = x2 + x - 20?

A. X = -5 and x = 4
B. X = - 4 and x = 5
C. x = -2 and x = 10
D. x = -10 and x = 2

Answer 1

A. x = -5, 4

Explanation:

0 = x^2 + x -20

0 = (x + 5)(x - 4)

x = -5, 4

Answer 2

Answer: x=-4 and x=5

Explanation:

0 = x^2 + x -20

0 = (x + 5)(x - 4)

then to find the zeros we should switch the signs so the answer is :

-4,5