Question

Which equation has roots of -1 and 2?

(1 - 1)(x - 2) = 0
(x - 1) (x + 2) = 0
(x + 1) (2 - 2) = 0
(x-1) (x + 2) = 0

Answer 1

(x+1) (x-2) = 0

Explanation:

Roots = -1 and 2

This means

X = -1 or x = 2

(x + 1) = 0 or (x -2) = 0

Combine the two equations

(x+1) (x-2) = 0