Enrhifo (complex solution)
-\frac{\sqrt{5}i}{21}+\frac{1}{7}\approx 0.142857143-0.106479427i
Enrhifo
\text{Indeterminate}
Rhan Real (complex solution)
\frac{1}{7} = 0.14285714285714285
Rhannu
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\frac{2}{\left(3+\sqrt{-5}\right)\times 3}
Mynegwch \frac{\frac{2}{3+\sqrt{-5}}}{3} fel ffracsiwn unigol.
\frac{2}{\left(3+\sqrt{5}i\right)\times 3}
Ffactora -5=5\left(-1\right). Ailysgrifennu ail isradd y lluoswm \sqrt{5\left(-1\right)} fel lluoswm ail israddau \sqrt{5}\sqrt{-1}. Drwy ddiffiniad, ail isradd -1 yw i.
\frac{2}{9+3\sqrt{5}i}
Defnyddio’r briodwedd ddosbarthu i luosi 3+\sqrt{5}i â 3.
\frac{2}{9+3i\sqrt{5}}
Lluosi 3 a i i gael 3i.
\frac{2\left(9-3i\sqrt{5}\right)}{\left(9+3i\sqrt{5}\right)\left(9-3i\sqrt{5}\right)}
Mae'n rhesymoli enwadur \frac{2}{9+3i\sqrt{5}} drwy luosi'r rhifiadur a'r enwadur â 9-3i\sqrt{5}.
\frac{2\left(9-3i\sqrt{5}\right)}{9^{2}-\left(3i\sqrt{5}\right)^{2}}
Ystyriwch \left(9+3i\sqrt{5}\right)\left(9-3i\sqrt{5}\right). Gellir trawsnewid lluosi yn wahaniaeth rhwng sgwariau drwy ddefnyddio’r rheol: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
\frac{2\left(9-3i\sqrt{5}\right)}{81-\left(3i\sqrt{5}\right)^{2}}
Cyfrifo 9 i bŵer 2 a chael 81.
\frac{2\left(9-3i\sqrt{5}\right)}{81-\left(3i\right)^{2}\left(\sqrt{5}\right)^{2}}
Ehangu \left(3i\sqrt{5}\right)^{2}.
\frac{2\left(9-3i\sqrt{5}\right)}{81-\left(-9\left(\sqrt{5}\right)^{2}\right)}
Cyfrifo 3i i bŵer 2 a chael -9.
\frac{2\left(9-3i\sqrt{5}\right)}{81-\left(-9\times 5\right)}
Sgwâr \sqrt{5} yw 5.
\frac{2\left(9-3i\sqrt{5}\right)}{81-\left(-45\right)}
Lluosi -9 a 5 i gael -45.
\frac{2\left(9-3i\sqrt{5}\right)}{81+45}
Lluosi -1 a -45 i gael 45.
\frac{2\left(9-3i\sqrt{5}\right)}{126}
Adio 81 a 45 i gael 126.
\frac{1}{63}\left(9-3i\sqrt{5}\right)
Rhannu 2\left(9-3i\sqrt{5}\right) â 126 i gael \frac{1}{63}\left(9-3i\sqrt{5}\right).
\frac{1}{63}\times 9+\frac{1}{63}\times \left(-3i\right)\sqrt{5}
Defnyddio’r briodwedd ddosbarthu i luosi \frac{1}{63} â 9-3i\sqrt{5}.
\frac{9}{63}+\frac{1}{63}\times \left(-3i\right)\sqrt{5}
Lluosi \frac{1}{63} a 9 i gael \frac{9}{63}.
\frac{1}{7}+\frac{1}{63}\times \left(-3i\right)\sqrt{5}
Lleihau'r ffracsiwn \frac{9}{63} i'r graddau lleiaf posib drwy dynnu a chanslo allan 9.
\frac{1}{7}-\frac{1}{21}i\sqrt{5}
Lluosi \frac{1}{63} a -3i i gael -\frac{1}{21}i.
\frac{2}{\left(3+\sqrt{-5}\right)\times 3}
Mynegwch \frac{\frac{2}{3+\sqrt{-5}}}{3} fel ffracsiwn unigol.
\frac{2}{9+3\sqrt{-5}}
Defnyddio’r briodwedd ddosbarthu i luosi 3+\sqrt{-5} â 3.
\frac{2\left(9-3\sqrt{-5}\right)}{\left(9+3\sqrt{-5}\right)\left(9-3\sqrt{-5}\right)}
Mae'n rhesymoli enwadur \frac{2}{9+3\sqrt{-5}} drwy luosi'r rhifiadur a'r enwadur â 9-3\sqrt{-5}.
\frac{2\left(9-3\sqrt{-5}\right)}{9^{2}-\left(3\sqrt{-5}\right)^{2}}
Ystyriwch \left(9+3\sqrt{-5}\right)\left(9-3\sqrt{-5}\right). Gellir trawsnewid lluosi yn wahaniaeth rhwng sgwariau drwy ddefnyddio’r rheol: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
\frac{2\left(9-3\sqrt{-5}\right)}{81-\left(3\sqrt{-5}\right)^{2}}
Cyfrifo 9 i bŵer 2 a chael 81.
\frac{2\left(9-3\sqrt{-5}\right)}{81-3^{2}\left(\sqrt{-5}\right)^{2}}
Ehangu \left(3\sqrt{-5}\right)^{2}.
\frac{2\left(9-3\sqrt{-5}\right)}{81-9\left(\sqrt{-5}\right)^{2}}
Cyfrifo 3 i bŵer 2 a chael 9.
\frac{2\left(9-3\sqrt{-5}\right)}{81-9\left(-5\right)}
Cyfrifo \sqrt{-5} i bŵer 2 a chael -5.
\frac{2\left(9-3\sqrt{-5}\right)}{81-\left(-45\right)}
Lluosi 9 a -5 i gael -45.
\frac{2\left(9-3\sqrt{-5}\right)}{81+45}
Lluosi -1 a -45 i gael 45.
\frac{2\left(9-3\sqrt{-5}\right)}{126}
Adio 81 a 45 i gael 126.
\frac{1}{63}\left(9-3\sqrt{-5}\right)
Rhannu 2\left(9-3\sqrt{-5}\right) â 126 i gael \frac{1}{63}\left(9-3\sqrt{-5}\right).
\frac{1}{63}\times 9+\frac{1}{63}\left(-3\right)\sqrt{-5}
Defnyddio’r briodwedd ddosbarthu i luosi \frac{1}{63} â 9-3\sqrt{-5}.
\frac{9}{63}+\frac{1}{63}\left(-3\right)\sqrt{-5}
Lluosi \frac{1}{63} a 9 i gael \frac{9}{63}.
\frac{1}{7}+\frac{1}{63}\left(-3\right)\sqrt{-5}
Lleihau'r ffracsiwn \frac{9}{63} i'r graddau lleiaf posib drwy dynnu a chanslo allan 9.
\frac{1}{7}+\frac{-3}{63}\sqrt{-5}
Lluosi \frac{1}{63} a -3 i gael \frac{-3}{63}.
\frac{1}{7}-\frac{1}{21}\sqrt{-5}
Lleihau'r ffracsiwn \frac{-3}{63} i'r graddau lleiaf posib drwy dynnu a chanslo allan 3.
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