Multiple zeros for linear equation about symbolics.jl HOT 1 OPEN

simplify(r(b)) = ((c^2)*f - c*(d^2) - 2.0b*c*d*g + 2.0b*c*e*f + (b^2)*(d^2)*h - 2.0(b^2)*d*e*g + (b^2)*(e^2)*f) / (d^2)
simplify(-a1 / (2a2)) = (2.0c*d*g - 2.0c*e*f) / (2((d^2)*h - 2.0d*e*g + (e^2)*f))
simplify(dr(b)) = (-2.0c*d*g + 2.0c*e*f + 2.0b*(d^2)*h - 4.0b*d*e*g + 2.0b*(e^2)*f) / (d^2)
simplify(c_r) = (-c*d*g + c*e*f) / (-(d^2)*h + 2.0d*e*g - (e^2)*f)
simplify(c_s) = (-c*d*g + c*e*f - (d^2)*e + (d^2)*g) / (-(d^2)*h + 2.0d*e*g - (e^2)*f)
simplify(dr(c_s)) = 0
simplify(dr(1)) = 0
simplify(dr(c_r)) = 0