DIFERRENCE OF 2 SQUARES 5

Factorize 1-9d²

Solution

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

1-9d² = 1² - 3²d²       

        = 1² - (3d)²       

        = (1 - 3d)(1 + 3d)

Hence 1-9d² = (1 - 3d)(1 + 3d)

TRY THIS…………….

Factorize 1 - 49c²