Solve for y
y=\frac{125-x^{2}}{4}
Solve for x (complex solution)
x=-\sqrt{125-4y}
x=\sqrt{125-4y}
Solve for x
x=\sqrt{125-4y}
x=-\sqrt{125-4y}\text{, }y\leq \frac{125}{4}
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4y=125-x^{2}
Subtract x^{2} from both sides.
\frac{4y}{4}=\frac{125-x^{2}}{4}
Divide both sides by 4.
y=\frac{125-x^{2}}{4}
Dividing by 4 undoes the multiplication by 4.
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