Friday, 3 October 2014

FACTORIZATION 3

factorize 49x2- 81y2

Solution

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

49x2- 81y2 = 72x2 - 92y2

                     = (7x)2 - (3y)2

                     = (7x - 3y)( 7x + 3y)

Hence 49x2 - 81y2 = (7x - 3y)( 7x + 3y)

TRY THIS………………………….


factorize 25x2- 100y2
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