Solve for ζ
\zeta =\frac{±25}{2}
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2\zeta =±25
Calculate the square root of 625 and get 25.
\frac{2\zeta }{2}=\frac{±25}{2}
Divide both sides by 2.
\zeta =\frac{±25}{2}
Dividing by 2 undoes the multiplication by 2.
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