Problem

Solve $x^{2}=21$, where $x$ is a real number. Simplify your answer as much as possible.

Solution

Step 1 ：Solve the equation: \(x^2 = 21\)

Step 2 ：The two possible values for x are: \(\boxed{\pm \sqrt{21}}\)

From Solvely APP
Source: https://solvelyapp.com/problems/41618/

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