Solve for a
a=\frac{x^{2}+y}{4}
Solve for x (complex solution)
x=-i\sqrt{y-4a}
x=i\sqrt{y-4a}
Solve for x
x=\sqrt{4a-y}
x=-\sqrt{4a-y}\text{, }y\leq 4a
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-x^{2}+4a=y
Swap sides so that all variable terms are on the left hand side.
4a=y+x^{2}
Add x^{2} to both sides.
4a=x^{2}+y
The equation is in standard form.
\frac{4a}{4}=\frac{x^{2}+y}{4}
Divide both sides by 4.
a=\frac{x^{2}+y}{4}
Dividing by 4 undoes the multiplication by 4.
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Simultaneous equation
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Limits
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