kill(all);

van=facebook.com/LearningCalculus$

f(x,y) :=   x^2 + y   - x * y^2$
g(x,y) := 2*x^2 + y^2 - x - y - 3*x*y$

z(x,y) := f(x,y)-g(x,y)$
z(x,y);

a:8$

for x: -a thru a do
    for y: -a thru a do
        if(z(x,y)=0) then
            printf(true, "Answer z(x,y)=z(~2d,~2d)=0~%", x,y, z(x,y))$