FACTORIZING 1

Factorize 121x²- 9y²

solution

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

121x²- 9y² = 11²x² - 3²y²

                     = (11x)² - (3y)²

                     = (11x - 3y)( 11x + 3y)

Hence 121x²- 9y² = (11x - 3y)(11x + 3y)

TRY THIS…………….

Factorize 64u²- 16v²