Factorize: Its urgent....
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Solution :
64x² + 144xy - 243y²
= ( 8x )² + 2(8x)(9y) + ( 9y )² - 243y²-81y²
= ( 8x + 9y )² - 324y²
= ( 8x + 9y )² - ( 18y )²
= ( 8x + 9y + 18y )( 8x + 9y - 18y )
= ( 8x + 27y )( 8x - 9y )
•••••
64x² + 144xy - 243y²
= ( 8x )² + 2(8x)(9y) + ( 9y )² - 243y²-81y²
= ( 8x + 9y )² - 324y²
= ( 8x + 9y )² - ( 18y )²
= ( 8x + 9y + 18y )( 8x + 9y - 18y )
= ( 8x + 27y )( 8x - 9y )
•••••
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