Solve for y
y=-x\left(x-4\right)
Solve for x (complex solution)
x=\sqrt{4-y}+2
x=-\sqrt{4-y}+2
Solve for x
x=\sqrt{4-y}+2
x=-\sqrt{4-y}+2\text{, }y\leq 4
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y=x\left(-x\right)+4x
Use the distributive property to multiply x by -x+4.
y=x^{2}\left(-1\right)+4x
Multiply x and x to get x^{2}.
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