Question

What is the factored form of x2 - 4x – 5?

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(x + 5)(x - 1)
(x + 5)(x + 1)
(x - 5)(x - 1)
(x - 5)(x + 1)

Answer 1

I think that the answer is D

Answer 2

(x - 5)(x + 1)

Explanation:

`{x}^(2) - 4x - 5 \\ = {x}^(2) - 5x + x - 5 \\ = x(x - 5) + 1(x - 5) \\ = (x - 5)(x + 1) \\`