Question

When expanded, the expression (a + 2b -c)2 is equal to
(A) a2 + 4b2 + c2 - 2ab - 2bc - ac
(B) a2 + 4b2 + c2 + 4ab + 4bc + 2ac
(C) a2 + 4b2 + c2 + 4ab – 4bc - 2ac
(D) a2 + 4b2 + c2 + 4ab - 4bc – 4ac​

Answer 1

Answer:

(a + 2b - c )²

a² + 4b² + c² + 4ab - 4bc - 2ca