FACTORIZE 1B

Factorize 121x²- 100y²

solution

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

121x²- 100y² = 11²x² - 10²y²

                     = (11x)² - (10y)²

                     = (11x - 10y)( 11x + 10y)

Hence 121x²- 100y² = (11x - 10y)(11x + 10y)

TRY THIS…………….

Factorize 49m²- 81n²