Datrys ar gyfer x (complex solution)
x=-\frac{\sqrt{2\left(f-1\right)}}{2}
x=\frac{\sqrt{2\left(f-1\right)}}{2}
Datrys ar gyfer f
f=2x^{2}+1
Datrys ar gyfer x
x=\frac{\sqrt{2\left(f-1\right)}}{2}
x=-\frac{\sqrt{2\left(f-1\right)}}{2}\text{, }f\geq 1
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