plz answer this fast
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Hii !!
(a ) ( KL - MN ) ( KL + MN )
Using identity , ( a + b ) ( a - b ) = a² - b².
=> ( KL)² - ( MN)²
=> k²l² - m² n².
( b ) ( 6x + 5 ) ( 6x + 6 ).
=> 6x ( 6x + 6 ) + 5 ( 6x + 6 ).
=> 36x² + 36x + 30x + 30
=> 36x² + 66x + 30.
( c ) ( 2b - a ) ( 2b + c )
=> 2b ( 2b + c) - a ( 2b + c ).
=> 4b² + 2bc - 2ab - ac
(a ) ( KL - MN ) ( KL + MN )
Using identity , ( a + b ) ( a - b ) = a² - b².
=> ( KL)² - ( MN)²
=> k²l² - m² n².
( b ) ( 6x + 5 ) ( 6x + 6 ).
=> 6x ( 6x + 6 ) + 5 ( 6x + 6 ).
=> 36x² + 36x + 30x + 30
=> 36x² + 66x + 30.
( c ) ( 2b - a ) ( 2b + c )
=> 2b ( 2b + c) - a ( 2b + c ).
=> 4b² + 2bc - 2ab - ac
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hope it will help u.....
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