$$x_{1} = - \sqrt{- y_{5}}$$
=
$$- \sqrt{- y_{5}}$$
=
-(-y5)^0.5
$$y_{1} = - \frac{13 \sqrt{- y_{5}}}{2} - \frac{3}{2}$$
=
$$- \frac{13 \sqrt{- y_{5}}}{2} - \frac{3}{2}$$
=
-1.5 - 6.5*(-y5)^0.5
$$x_{2} = \sqrt{- y_{5}}$$
=
$$\sqrt{- y_{5}}$$
=
(-y5)^0.5
$$y_{2} = \frac{13 \sqrt{- y_{5}}}{2} - \frac{3}{2}$$
=
$$\frac{13 \sqrt{- y_{5}}}{2} - \frac{3}{2}$$
=
-1.5 + 6.5*(-y5)^0.5