Four of the five parts numbered (a),(b),(c),(d) and (e) in the following equation are exactly equal. Which of the parts is not equal to the other four? The number of that part is the answer.  Choose the correct choice from the following answers
A) (a – b)2 + 4ab B) a(a + b) + b(a + b) C) (a2 – b2) + 2b(b + a) D) (a – b)b + (a + b)2b E) (a + b)2 – 2a(a – b) + a(2a – 2b)
The other parts are equal to (a + b)2.   Answer (a – b)b + (a + b)2b
<result>D</result>
Four of the five parts numbered (a),(b),(c),(d) and (e) in the following equation are exactly equal. Which of the parts is not equal to the other four? The number of that part is the answer.