Question

Simplify the following: (2x – y + 3) (2x – y – 3)​

Answer 1

Step-by-step explanation:

let us consider 2x-y as 'a' and 3 as 'b'

we know that (a-b)(a+b)=à^2-b^2

so, (2x-y)^2-3^2

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

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

Answer 2

Answer:

4x²- 4xy + y² - 9

Step-by-step explanation:

(2x - y +3)(2x - y- 3)

= (2x - y)² - (3)²

= 4x² - 4xy + y² - 9