Question 940115
Let x=1 and y=2. 
N=x²+2xy+y²+1
  =(x)²+2.x.y+(y)²+1
  =(x+y)²+1
  =(1+2)²+1
  =3²+1
  =9+1
  =10

N=10
answer
Krutartha