Question

simplify the expressions (a-b)2 - (a+b) (a-b)

Answer 1

(a-b) 2-(a²-b²)
2a-2b-(a²-b²)
2(a-b) -(a²-b²)
I hope this is helpful

Answer 2

$2 {(a - b)}^{2} - (a + b)(a - b) \\ {2a}^{2} + {2b}^{2} - 4ab - {a}^{2} + {b}^{2} \\ {a}^{2} + {3b}^{2} - 4ab$
glad to help you