Advertisements
Advertisements
Question
Factorise : a - b - 4a2 + 4b2
Sum
Advertisements
Solution
a - b - 4a2 + 4b2
= ( a - b ) - 4( a2 - b2 )
= ( a - b ) - 4( a - b )( a + b ) [ ∵ a2 - b2 = ( a + b )( a - b )]
= ( a - b )[ 1 - 4( a + b )]
= ( a - b )[ 1 - 4a - 4b ]
shaalaa.com
Is there an error in this question or solution?
