Question

a2 - b2 - (a + b)^2​

Answer 1

Step-by-step explanation:

$= {a}^{2} - {b}^{2} - {(a + b)}^{2} \\ = {a}^{2} - {b}^{2} - {a}^{2} - {b}^{2} - 2ab \\ = - 2ab$

Hope it will help you...