Question

Write this trinomial in factored form.
5b^2-b-4

Answer 1

(5b + 4)(b - 1).

Explanation:

5b^2 - b - 4 (- 4 * 5 = -20 and -5b + 4b = -b so we have:

= 5b^2 - 5b + 4b - 4

= 5b(b - 1) + 4(b - 1)

= (5b + 4)(b - 1).