108 Ã— 108 + 92 Ã— 92 = ?	Choices:  A) 20120  B) 11500  C) 20128  D) 20660  E) 20228

Rationale: explanation : ( a + b ) 2 + ( a â ˆ ’ b ) 2 = 2 ( a 2 + b 2 ) ( reference : basic algebraic formulas ) 1082 + 922 = ( 100 + 8 ) 2 + ( 100 â ˆ ’ 8 ) 2 = 2 ( 1002 + 82 ) = 2 ( 10000 + 64 ) = 20128 . answer : option c
Answer: C