find The last digit in the product 287 x 287 + 269 x 269 - 2 x 287 x 269? Choose one
A) 5  B) 6  C) 8  D) 9  E) 4
4xplanation:   Given 4xp.	= a2 + b2 - 2ab, where a = 287 and b = 269   = (a - b)2 = (287 - 269)2   = (182)   = 324   Answer is 4
<result>E</result>
find The last digit in the product 287 x 287 + 269 x 269 - 2 x 287 x 269?