Question

factorise a^2-2ab+b^2 -c^2​

Answer 1

Answer:

(a-b+c)(a-b-c)

Step-by-step explanation:

We know,

a²-2ab+b² = (a-b)²

So, a²-2ab+b²-c²

= (a-b)²-c². [a²-b² = (a+b)(a-b)]

= (a-b+c)(a-b-c)