Question

Factorise 2x^2 -x-21​

Answer 1

(x + 3) × (2x - 7)

Explanation:

2x² - x - 21

Write as a difference

2x² + 6x - 7x - 21

Factor the expressions

2x × (x + 3) - 7 (x + 3)

Factor the expression

(x +3) × (2x - 7)