Question

use suitable identity to solve (5x-y)^2-(5x+y)^2​

Answer 1

Answer:

it's simple

first open first one

(5x-y)²= 25x²+y²-10xy

and now second one

(5x+y)²=25x²+y²+10xy

and subtract first - two

25x²+y²-10xy-(25x²+y²+10xy)

=-20xy

give like

Answer 2

Step-by-step explanation:

using the formulae (a+b)2 and (a-b)2

therefore answer is 50x2+2y2