The value of 162+122 is equal to
400
410
420
440
The given expression is
162+122
=(14+2)2+(14−2)2
=2(142+22) [(x+y)2+(x−y)2=2(x2+y2)]
=2(196+4)
=2×200
=400
Compute the value of 122+82
The value of expression 122×52 is equal to