Solve for y
y=4-x^{2}
Solve for x (complex solution)
x=-\sqrt{4-y}
x=\sqrt{4-y}
Solve for x
x=\sqrt{4-y}
x=-\sqrt{4-y}\text{, }y\leq 4
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-y=x^{2}-4
The equation is in standard form.
\frac{-y}{-1}=\frac{x^{2}-4}{-1}
Divide both sides by -1.
y=\frac{x^{2}-4}{-1}
Dividing by -1 undoes the multiplication by -1.
y=4-x^{2}
Divide x^{2}-4 by -1.
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