Solve for y
y=x^{2}-42
Solve for x (complex solution)
x=-\sqrt{y+42}
x=\sqrt{y+42}
Solve for x
x=\sqrt{y+42}
x=-\sqrt{y+42}\text{, }y\geq -42
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y=x^{2}-42
Add -45 and 3 to get -42.
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