Question

C) (5x + 2y)2 + (5x – 2y)2​
​

Answer 1

Answer:

50x² + 8y²

Step-by-step explanation:

Given (5x + 2y)² + (5x – 2y)2²

= (5x)² + 20xy + (2y)² + (5x)² - 20xy + (2y)²

= (25x² ×2) + (4y² × 2)

= 50x² + 8y²