Question

expand the following
(x - y)2 – (x + y)2​

Answer 1

( x - y ) ² - ( x + y ) ²

Using the identities

❥ ( a - b ) ² = a² - 2ab + b²

❥ ( a + b ) ² = a² + 2ab + b²

( x² - 2xy + y² ) - ( x² + 2xy + y² )

x² - 2xy + y² - x² - 2xy - y²

- 2xy - 2xy

Answer ➡ - 4xy

Answer 2

Answer:

-4xy

Step-by-step explanation:

(x-y)²-(x+y)²

By using identity

x²-2xy+y²-(x²+2xy+y²)

x²-2xy+y²-x²-2xy-y²

x²-x²+y²-y²-2xy-2xy

-4xy

correct explanation