Question

(2x+7y)^2 ( 2x-7y)^2 use 3rd identity ​

Answer 1

Answer:

Third identity = a² - b² = (a+b) (a-b).

Step-by-step explanation:

(2x+7y)² ( 2x-7y)² = a²- b²

= (2x) ² - (7y) ²

= 4x² - 49y²

Hope it will help you, if then please mark me as brainliest.