Question

simplify using formula (a-b)²- (a²-b²)​

Answer 1

$\huge\bold{\color{aqua}{Solution :-}}$

$\quad\bold{(a-b)²-(a²-b²)}$

$=\bold{(a-b)²-(a+b)(a-b)\qquad\tiny\therefore\orange{x²-y²=(x+y)(x-y)}}$

$=\bold{\big(a-b\big)\big((a-b)-(a+b)\big)}$

$=\bold{(a-b)(a-b-a-b)}$

$=\bold{(a-b)(-2b)}$

$=\bold{\green{\boxed{\pink{-2b(a-b)}}}}$