Solve for x
x\in \begin{bmatrix}-\frac{2}{3},\frac{2}{3}\end{bmatrix}
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x^{2}\leq \frac{4}{9}
Add \frac{4}{9} to both sides.
x^{2}\leq \left(\frac{2}{3}\right)^{2}
Calculate the square root of \frac{4}{9} and get \frac{2}{3}. Rewrite \frac{4}{9} as \left(\frac{2}{3}\right)^{2}.
|x|\leq \frac{2}{3}
Inequality holds for |x|\leq \frac{2}{3}.
x\in \begin{bmatrix}-\frac{2}{3},\frac{2}{3}\end{bmatrix}
Rewrite |x|\leq \frac{2}{3} as x\in \left[-\frac{2}{3},\frac{2}{3}\right].
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