Question

factorize it pls tell the answer​

Answer 1

Step-by-step explanation:

a(a-1)-b(b-1) =a²-a-b²+b

=a²-b²-a+b

Answer 2

$\bf{\large{\underline{Answer ~~♡}}}$

$a(a - 1) - b(b - 1) \\ \\ = {a}^{2} - a - {b}^{2} + b \\ \\ = ( {a}^{2} - {b}^{2} ) - (a - b) \\ \\ = (a + b)(a - b) - (a - b) \\ \\ = (a - b)(a + b - 1)$

Identity Used :-

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