Question

Expand the following:
(2x - 5) (2x + 5) (2x- 3)

Answer 1

(2x - 5) (2x + 5) (2x- 3)
= (4x² - 25) (2x - 3)
= 8x³ - 12x² - 50x + 75
(Using identity : (x - a) (x + b)
= x² - (a - b) x - ab).