Question

9(a+b)² 16(a-b)² factorise ​

Answer 1

Answer:

Here goes the solution!

9( a + b )² - 16( a - b )²

3²( a + b )² - 4²( a - b )²

[ 3(a + b) ]² - [ 4(a - b) ]²

( 3a + 3b )² - ( 4a - 4b )²

[ (3a + 3b) + (4a - 4b) ] [ (3a + 3b) - (4a - 4b) ]

(3a + 3b + 4a - 4b) (3a + 3b - 4a + 4b)

(7a + b) (a + 7b)