решить систему уравнений x^2y+y=9, y+x^2=9

x^2y+y = 9, y*(x^2 + 1) = 9,
y = 9/(x^2+1),
y+x^2 = 9, y = 9 - x^2
9/(x^2 + 1) = 9 - x^2,
9 = (9-x^2)*(x^2+1),
9 = 9x^2 + 9 - x^4 - x^2,
x^4 - 8x^2 = 0,
x^2*(x^2 - = 0,
x1=0 или x^2 = 8,
y1 = 9,
x2 = корень (8) = 2*корень (2),
y2 = 9-8 = 1,
x3 = -корень (8) = -2*корень (2).
y3 = 9-8 = 1.