y = \sqrt[ ]{ 15-x- { x }^{ 2 } } -4
Solve for x (complex solution)
x=\frac{-\sqrt{-4y^{2}-32y-3}-1}{2}
x=\frac{\sqrt{-4y^{2}-32y-3}-1}{2}\text{, }y=-4\text{ or }arg(y+4)<\pi
Solve for x
x=\frac{-\sqrt{-4y^{2}-32y-3}-1}{2}
x=\frac{\sqrt{-4y^{2}-32y-3}-1}{2}\text{, }y+4\geq 0\text{ and }y\leq \frac{\sqrt{61}}{2}-4
Solve for y
y=\sqrt{15-x-x^{2}}-4
x\geq \frac{-\sqrt{61}-1}{2}\text{ and }x\leq \frac{\sqrt{61}-1}{2}
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