Simplify: (a+b+c)2−(a−b−c)2(a+b+c)^2 - (a-b-c)^2(a+b+c)2−(a−b−c)2
2(b+c)22(b+c)^22(b+c)2
Both a and c
4ab+4ac4ab + 4ac4ab+4ac
4a(b+c)4a(b+c)4a(b+c)