Question

4(a + b)² - 9 (a - b)²​

Answer 1

[2(a+b)]^² - [3(a-b)]^²

now it is in the form of a^² - b^²

(a+b)(a-b)

[2(a+b)+3(a-b)][2(a+b)-3(a-b)

[2a+2b+3a-3b][2a+2b-3a+3b]

[5a-b][-a+5b]

[5a-b][5b-a]