Question

15. Simplify the following:
(i) (x + y)² - (x - y)²?​

Answer 1

Answer:

4xy is the answer.

Step-by-step explanation:

(x²+y²+2xy) - (x²+y²-2xy)

⇒x²+y²+2xy-x²-y²+2xy

⇒2xy+2xy

⇒4xy is the answer.