Simplify (212 * 212 + 312 * 312 ) Pick:
A) 132288
B) 142088
C) 142188
D) 142288
E) None of these
Explanation:   Trick: Above equation can be solved by using following formula   (a2+b2)=1/2((a+b)2+(a−b)2)   Option 142288
<result>D</result>
Simplify (212 * 212 + 312 * 312 )