Solve for y
y=-\frac{x^{2}}{9}+4
Solve for x (complex solution)
x=-3\sqrt{4-y}
x=3\sqrt{4-y}
Solve for x
x=3\sqrt{4-y}
x=-3\sqrt{4-y}\text{, }y\leq 4
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9y=36-x^{2}
Subtract x^{2} from both sides.
\frac{9y}{9}=\frac{36-x^{2}}{9}
Divide both sides by 9.
y=\frac{36-x^{2}}{9}
Dividing by 9 undoes the multiplication by 9.
y=-\frac{x^{2}}{9}+4
Divide -x^{2}+36 by 9.
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