Question

Simplify: (5x+3y)²+(5x-3y)²​

Answer 1

Answer:

= 50x² + 18y²

Step-by-step explanation:

(5x+3y)²+(5x-3y)²

= {(5x)² + (3y)² + 2*5x*3y} + {(5x)² + (3y)² - 2*5x*3y

= (25x² + 9y² + 30xy) + (25x² + 9y² - 30xy)

= 25x² + 9y² + 30xy + 25x² + 9y² - 30xy

= 25x² + 25x² + 9y² + 9y² + 30xy - 30xy

= 50x² + 18y²

If this answer will help you then, you follow me and mark my answer be Brainliests answer.

Answer 2

Answer:

$(a + b)^{2} = {a}^{2} + \: b^{2} \: + 2ab \: \\ (a - b)^{2} = a ^{2} + b ^{2} - 2ab$

By using

Step-by-step explanation:

please refer to attachment