Question

What is the factored form of x2 – X-2?

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

Answer 1

(x+2)(x-1)

Explanation:

x^2-x-2

• (x^2+2x)(-x-2)
• x(x+2)-1(x+2)
• (x+2)(x-1)

Answer 2

( x-2) (x+1)

Explanation:

x^2 – x-2

What two numbers multiply to -2 and add to -1

-2 * 1 = -2

-2 +1 = -1

( x-2) (x+1)