Question

factorise 1-a square - b square-2ab

Answer 1

Step-by-step explanation:

$1 - {a}^{2} - {b}^{2} - 2ab \\ = 1 - ( {a}^{2} + {b}^{2} + 2ab) \\ = {(1)}^{2} - {(a + b)}^{2} \\ = (1 + a + b)(1 - a - b) \: are \: the \: required \: </p><p>factors \:$