Enrhifo
3\sqrt{5}+5\approx 11.708203932
Ffactor
\sqrt{5} {(\sqrt{5} + 3)} = 11.708203932
Rhannu
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\frac{-\frac{2\times 5}{5}-\frac{6\sqrt{5}}{5}}{2\left(-\frac{1}{5}\right)}
I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Lluoswch -2 â \frac{5}{5}.
\frac{\frac{-2\times 5-6\sqrt{5}}{5}}{2\left(-\frac{1}{5}\right)}
Gan fod gan -\frac{2\times 5}{5} a \frac{6\sqrt{5}}{5} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.
\frac{\frac{-10-6\sqrt{5}}{5}}{2\left(-\frac{1}{5}\right)}
Gwnewch y gwaith lluosi yn -2\times 5-6\sqrt{5}.
\frac{\frac{-10-6\sqrt{5}}{5}}{\frac{2\left(-1\right)}{5}}
Mynegwch 2\left(-\frac{1}{5}\right) fel ffracsiwn unigol.
\frac{\frac{-10-6\sqrt{5}}{5}}{\frac{-2}{5}}
Lluosi 2 a -1 i gael -2.
\frac{\frac{-10-6\sqrt{5}}{5}}{-\frac{2}{5}}
Gellir ailysgrifennu \frac{-2}{5} fel -\frac{2}{5} drwy echdynnu’r arwydd negatif.
\frac{\left(-10-6\sqrt{5}\right)\times 5}{5\left(-2\right)}
Rhannwch \frac{-10-6\sqrt{5}}{5} â -\frac{2}{5} drwy luosi \frac{-10-6\sqrt{5}}{5} â chilydd -\frac{2}{5}.
\frac{-6\sqrt{5}-10}{-2}
Canslo 5 yn y rhifiadur a'r enwadur.
5+3\sqrt{5}
Rhannu pob term -6\sqrt{5}-10 â -2 i gael 5+3\sqrt{5}.
Enghreifftiau
Hafaliad cwadratig
{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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699 * 533
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\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Gwahaniaethu
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Terfynau
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}