Question

Factorise:
9(2a-b)^2-4(2a-b)-13​

Answer 1

Let the value of 2a-b be x. Then

A.T.Q.

9x²-4x-13------------------------1

By factorising method

9x²-13x+9x-13

x×(9x-13)+1×(9x-13)

(x+1)(9x-13)

From Equation 1

[2a-b+1][9×(2a-b)-13]

[2a-b+1][18a-9b-13]