Question

Factorise 3-12(a-b)^2

Answer 1

3( 1 - 4(a - b)2))

3( 12 - [2(a - b)]2 ))

3( 1 + 2( a - b)) ( 1 - (2(a - b))) ]

3[ 1 + 2a - 2b) ( 1 - (2a - 2b)

3(1+ 2a - 2b)(1 -2a + 2b)

Ans: 3(1+ 2a - 2b)(1 -2a + 2b)