Question

4x²-y²/25, Factorise it using appropriate identities.

Answer 1

4x ^2 - y ^2 / 25

( 2x ) ^2 - ( y / 5 ) ^2 = a ^2 - b ^2 = ( a + b ) ( a - b )

( 2x - y / 5) ( 2x + y / 5 )

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Answer 2

Solution :

Given 4x² - y²/25

= ( 2x )² - ( y/5 )²

= ( 2x + y/5 )( 2x - y/5 )

[ Since , a² - b² = ( a + b )( a - b ) ]

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