Question

Expand using suitable identity : i) (5x + 3y)^2
ii) (7a - 4b)^2​

Answer 1

Answer:

(5x+3y)² =25x²+30xy+9y²

(7a-4b)²= 49a²-56ab+16b²

Answer 2

Step-by-step explanation:

i) (5x + 3y)²

= (5x)² + 2(5x)(3y) + (3y)²

= 25x² + 30xy + 9y²

ii) (7a - 4b)²

= (7a)² - (2)(7a)(4b) + (4b)²

= 49a² - 56ab + 16b²

HOPE IT HELPS YOU..............................