Question

12.Is(a—b+c)²=(—a+b–c)²?​

Answer 1

Answer:

1. =a×a-b×b+c×c = -a×-a+b×b-c×-c
2. =a^2-b^2+c^2 =a^2+b^2+c^2
3. = -b^2 = b^2

this is your right answer