Question

4w^2-21w+20 factor the quadratic expression

Answer 1

`(4w-5)(w-4)`

Explanation:

`4w^(2)-21w+20\\ 4w^(2)-5w-16w+20\\ w(4w-5)-16w+20\\w(4w-5)-4(4w-5)\\(4w-5)(w-4)`

Answer 2

(4w - 5) (w - 4)

Explanation:

4w² - 21w + 20

We will look two numbers that when we add will give is -21 and when we multiply will give us 20 × 4= 80 and these numbers are -16 and -5.

4w² - 16w - 5w + 20

4w(w - 4) - 5(w - 4)

(4w - 5) (w - 4)