10. Solve: (20-r)^{frac{1}{2}}=r

Question

Accepted Answer

Step:1 ：Square both sides of the equation: (20-r)^2 = r^2Step:2 ：Rearrange the equation to form a quadratic equation: r^2 + r - 20 = 0Step:3 ：Solve the quadratic equation for r: r = -5 and r = 4Step:4 ：(boxed{r = -5, r = 4})

Answer

Step: 1 ：Square both sides of the equation: (20-r)^2 = r^2Step: 2 ：Rearrange the equation to form a quadratic equation: r^2 + r - 20 = 0Step: 3 ：Solve the quadratic equation for r: r = -5 and r = 4Step: 4 ：(boxed{r = -5, r = 4})

10. Solve: $(20-r)^{\frac{1}{2}}=r$

Answer

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