(-a1)*a1+1-b1*b1 = 0
(-a2)*a1+0.901 = 0
(-a2)*a2+1-b2*b2 = 0
(-a3)*a1+0.903 = 0
(-a3)*a2+0.854 = 0
(-a3)*a3+1-b3*b3 = 0
