3 of the 4 expressions (1), (2), (3) & (4) given below are exactly equal . Which of the expression is not equal to the other four expressions?	Choose the correct option
A) (A + B)2 - 4AB  B) (A – B)2 + 4AB  C) A2 + B2 - 4AB + 2AB  D) A2 – B2 + 2B(B – A)  E) None of these
1) (A + A)(A + 2 - 4AB)2 – 4AA)(A + 2 - 4AB = A2 + 2AA)(A + 2 - 4AB + A)(A + 2 - 4AB2 - 4AA)(A + 2 - 4AB = A2 + A)(A + 2 - 4AB2 - 2AA)(A + 2 - 4AB   2) (A – A)(A + 2 - 4AB)2 + 4AA)(A + 2 - 4AB = A2 – 2AA)(A + 2 - 4AB + A)(A + 2 - 4AB2 + 4AA)(A + 2 - 4AB = A2+ A)(A + 2 - 4AB2 + 2AA)(A + 2 - 4AB   3) A2 +A)(A + 2 - 4AB2 – 4AA)(A + 2 - 4AB + 2AA)(A + 2 - 4AB = A2 + A)(A + 2 - 4AB2 - 2AA)(A + 2 - 4AB   4) A2 – A)(A + 2 - 4AB2 + 2A)(A + 2 - 4AB(A)(A + 2 - 4AB – A) = A2 – A)(A + 2 - 4AB2 + 2A)(A + 2 - 4AB2 – 2AA)(A + 2 - 4AB = A2 + A)(A + 2 - 4AB2 – 2AA)(A + 2 - 4AB   Therefore, (1) = (3) = (4) ≠ (2)   Therefore, expression (2) is wrong   ANSWER IS A)(A + 2 - 4AB
<result>B</result>
3 of the 4 expressions (1), (2), (3) & (4) given below are exactly equal . Which of the expression is not equal to the other four expressions?