Question

Simplify (2x-y-5) (2x-y+5)​

Answer 1

Step-by-step explanation:

this will be

$(2x - y) {}^{2} - 5 {}^{2}$

and open the bracket by

$(a - b) {}^{2}$

Answer 2

(2x-y-5) (2x-y+5)

Using identity (a-b)(a+b)=a^2-b^2

(2x-y-5)(2x-y+5)

(2x-y)^2 - 5^2

Using (a-b)^2= a^2+b^2-2ab

4x^2+ y^2- 4xy -25