Question

Factorise each of the following: (2x – y)² – 9z² using identites​

Answer 1

Step-by-step explanation:

(2x-y)^2 -9z^2

(2x)^2 +(y)^2- 2 × 2x × y -9z^2

4x^2 + y^2 -4xy -9z^2