Question

using suitable identity of (2x +5y ) ( 2x-5y)​

Answer 1

Answer:

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

Step-by-step explanation:

That's the identity you will use here

so the answer will be

(2x+5y)(2x-5y) = [(2x)^2 - (5y)^2]

= 4x^2 - 25y^2

Answer 2

Answer:

20 xy + 4xpower 2 +25y power 2