Question

(a + b + c)2 - (a - b + c)2​

Answer 1

(a+b+c)2-(a-b+c)2

Solution:

=(a+b+c+a−b+c){a+b+c−(a−b+c)}

=(2a+2c)(a+b+c−a+b−c)

= (2a+2c)(2b)

= 4ab+ 4bc

ANS:4ab+4bc

I HOPE IT HELPS. ☺