Question

Simplify
A. (a^2+b^2)^2-(a^2-b^2)^2
B. (3.5a+4.5b)^2-(3.5a-4.5b)^2

Answer 1

Hello Dear Brainly user...

Here is solution for your question

we know that

a² - b² = (a +b) (a -b)

A.

=> (a² + b²)² - (a²- b²)²

=> { (a² + b²) + ( a² - b²) } × { (a² + b²) - (a² - b²) }

=> { 2a² } × { 2b²}

=> 4 a² b² Answer

B.

=> (3.5a + 4.5b)² - (3.5a - 4.5b)²

=> { (3.5a + 4.5b) + ( 3.5a - 4.5b) } × { (3.5a + 4.5b) - (3.5a - 4.5b) }

=> { 2× 3.5a } × {2 × 4.5b}

=> 7a × 9b

=> 63 ab Answer

Hope it helps :-)