Question

factorise a^2+b^2-c^2-2ab​

Answer 1

Answer:

a

2

−2ab+b

2

−c

2

=(a−b)

2

−c

2

(∵(x−y)

2

=x

2

−2xy+y

2

)

=(a−b+c)(a−b−c)(∵x

2

−y

2

=(x−y)(x+y))