Question

3) Factor x2 – 8x – 9.
Check

Answer 1

(x - 9)(x + 1)

Explanation:

Given

x² - 8x - 9

Consider the factors of the constant term (- 9) which sum to give the coefficient of the x- term (- 8)

The factors are - 9 and + 1, since

- 9 × 1 = - 9 and - 9 + 1 = - 8, thus

x² - 8x - 9 = (x - 9)(x + 1)

Answer 2

(x-9)(x+1)

Explanation:

factor using the box method or quadratic formula.