When expanded, the expression
(a + 2b - c) 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
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a2 plus 4b2 is right or wrong?
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Answer:
When expanded, the expression
(a + 2b - c) 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
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