FACTORIZE 1

Factorize 81 - 225m²

Solution

We use difference of two squares a² – b² = (a - b)(a + b)

81 - 225m² = 9² - 15²m²       

                = 9² – (15m)²       

                = (9 - 15m)(9 + 15m)

Hence 81 - 225m² = (9 - 15m)(9 + 15m) answer

TRY THIS…………….

Factorize 49 – 121y²