Datrys ar gyfer x
x\in \left(-\sqrt{15},\sqrt{15}\right)
Graff
Rhannu
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x^{2}-15<0
Lluosi 5 a -3 i gael -15.
x^{2}<15
Ychwanegu 15 at y ddwy ochr.
x^{2}<\left(\sqrt{15}\right)^{2}
Cyfrifo ail isradd 15 a chael \sqrt{15}. Ailysgrifennwch 15 fel \left(\sqrt{15}\right)^{2}.
|x|<\sqrt{15}
Mae anghydraddoldeb ar gyfer |x|<\sqrt{15}.
x\in \left(-\sqrt{15},\sqrt{15}\right)
Ailysgrifennwch |x|<\sqrt{15} fel x\in \left(-\sqrt{15},\sqrt{15}\right).
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