5 d s = d ( 1 - s ^ { 2 } )
Solve for d
\left\{\begin{matrix}\\d=0\text{, }&\text{unconditionally}\\d\in \mathrm{R}\text{, }&s=\frac{\sqrt{29}-5}{2}\text{ or }s=\frac{-\sqrt{29}-5}{2}\end{matrix}\right.
Solve for s
\left\{\begin{matrix}\\s=\frac{\sqrt{29}-5}{2}\text{; }s=\frac{-\sqrt{29}-5}{2}\text{, }&\text{unconditionally}\\s\in \mathrm{R}\text{, }&d=0\end{matrix}\right.
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5ds=d-ds^{2}
Use the distributive property to multiply d by 1-s^{2}.
5ds-d=-ds^{2}
Subtract d from both sides.
5ds-d+ds^{2}=0
Add ds^{2} to both sides.
\left(5s-1+s^{2}\right)d=0
Combine all terms containing d.
\left(s^{2}+5s-1\right)d=0
The equation is in standard form.
d=0
Divide 0 by 5s+s^{2}-1.
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