{(476 + 424)2 - 4 x 476 x 424} = ?  Pick.
A) 2135 B) 6551 C) 2704 D) 6466 E) 1113

Rationale: given exp . = [ ( a + b ) 2 - 4 ab ] , where a = 476 and b = 424 = [ ( 476 + 424 ) 2 - 4 x 476 x 424 ] = [ ( 900 ) 2 - 807296 ] = 810000 - 807296 = 2704 . correct option is c
Answer: C