Question

x2+2xy+y2-x+y para x=1 e y =3

Answer 1

x²+2xy+y²-x+y=
1²+2·1·3+3²-1+3=
1+6+9-1+3=
19-1=
18

Answer 2

X² +2*X*Y²+Y*2-X+Y

1²+ 2*1*3+3² *-1+3    => 18