Question

factorise 5+6(2a+b)-8(2a+b)square​

Answer 1

Answer:

Let (2a + b) = x

(2a + b)2 = x2

(2a + b)2 + 5(2a + b) +6

= x2 + 5x + 6

= x2 + 3x + 2x + 6

= x (x + 3) + 2 (x + 3)

= (x + 3) (x + 2)

= (2a + b + 3) (2a + b + 2)

(Substituting the value of x)