Solve for ξ
\xi =\frac{y^{2}}{7}
Solve for y (complex solution)
y=-\sqrt{7\xi }
y=\sqrt{7\xi }
Solve for y
y=\sqrt{7\xi }
y=-\sqrt{7\xi }\text{, }\xi \geq 0
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7\xi =y^{2}
Add y^{2} to both sides. Anything plus zero gives itself.
\frac{7\xi }{7}=\frac{y^{2}}{7}
Divide both sides by 7.
\xi =\frac{y^{2}}{7}
Dividing by 7 undoes the multiplication by 7.
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