Question

factories it -:

$b^{2} - 9$
$a ^{2} - 2ab + b^{2} - c ^{2}$
​

Answer 1

Answer:

b²-9

=(b)²-(3)²

=(b+3)(b-3) [Using the identity: a²-b²=(a+b)(a-b)]

a²-2ab+b²-c²

[(a)²-2×a×b+(b)²]-c²

(a-b)²-(c)²  [Using the identity: (a-b)² = a²-2ab+b²

(a-b+c)(a-b-c)  [Using the identity: a²-b²=(a+b)(a-b)]