Question

(a) x2 + 2xy + y2,x2 – 2xy + y2​

Answer 1

Addition :-

x² + 2xy + y² + x² - 2xy + y²

2x² + 2y²

2 ( x² + y² )

Subtraction :-

❥ x² - 2xy + y² - ( x² + 2xy + y² )

x² - 2xy + y² - x² - 2xy - y²

Answer ➡ 0

❥ x² + 2xy + y² - ( x² - 2xy + y² )

x² + 2xy + y² - x² + 2xy - y²

Answer ➡ 4xy