Question

(2a²+ 3)² – (2a² – 3)² बराबर है
(A) 24a² (B) 24a⁴ (C) 72a² (D) 72a⁴

Answer 1

:Solution:

(2a² + 3)² - (2a² - 3)²

=> (2a²)² + (3)² + 2(2a²)(3) - [ (2a²)² + (3)² - 2(2a²)(3)]

=> 4a⁴ + 9 + 12a² - [ 4a⁴ + 9 - 12a²]

=> 4a² + 9 + 12a² - 4a² - 9 + 12a²

=> 24a²

So, the option A: 24a² is right answer.