Datrys ar gyfer x
x\in \begin{bmatrix}-2,2\end{bmatrix}
Graff
Rhannu
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x^{2}\leq 4
Ychwanegu 4 at y ddwy ochr.
x^{2}\leq 2^{2}
Cyfrifo ail isradd 4 a chael 2. Ailysgrifennwch 4 fel 2^{2}.
|x|\leq 2
Mae anghydraddoldeb ar gyfer |x|\leq 2.
x\in \begin{bmatrix}-2,2\end{bmatrix}
Ailysgrifennwch |x|\leq 2 fel x\in \left[-2,2\right].
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