(a + b – c + d)2 – (a – b + c – d)2 = ? – McqOptions

MCQOPTIONS

1.	(a + b – c + d)2 – (a – b + c – d)2 = ?
A.	2a (a + b – c)
B.	4a (b + d – c)
C.	2a (b + c – d)
D.	4a (b – d + c)
Answer» C. 2a (b + c – d)

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