Question

expand ( a - b + c )^2

Answer 1

hey mate.....

=>> (a - b + c)2 = [a + (- b) + c]2

                   = a2 + (-b2) + c2 + 2 (a) (-b) + 2 (-b) (-c) + 2 (c) (a) 

                   = a2 + b2 + c2 – 2ab – 2bc + 2ca

Therefore, (a - b + c)2 = a2 + b2 + c2 – 2ab – 2bc + 2ca

hope it's help you.

Answer 2

( a - b + c )^2

= a^2 + (-b)^2 + c^2 - 2ab -2bc + 2ac

= a^2 +b^2 + c^2 - 2ab -2bc + 2ac