FACTORIZE 1

Factorize 121x²- 16y²

solution

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

121x²- 16y² = 11²x² - 4²y²

                = (11x)² - (4y)²

                = (11x - 4y)( 11x + 4y)

Hence 121x²- 16y² = (11x - 4y)(11x + 4y)

TRY THIS…………….

Factorize 49m²- 100n²