Enrhifo
\frac{\sqrt{2}-10}{14}\approx -0.61327046
Rhannu
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\frac{7\left(-10+\sqrt{2}\right)}{\left(-10-\sqrt{2}\right)\left(-10+\sqrt{2}\right)}
Mae'n rhesymoli enwadur \frac{7}{-10-\sqrt{2}} drwy luosi'r rhifiadur a'r enwadur â -10+\sqrt{2}.
\frac{7\left(-10+\sqrt{2}\right)}{\left(-10\right)^{2}-\left(\sqrt{2}\right)^{2}}
Ystyriwch \left(-10-\sqrt{2}\right)\left(-10+\sqrt{2}\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{7\left(-10+\sqrt{2}\right)}{100-2}
Sgwâr -10. Sgwâr \sqrt{2}.
\frac{7\left(-10+\sqrt{2}\right)}{98}
Tynnu 2 o 100 i gael 98.
\frac{1}{14}\left(-10+\sqrt{2}\right)
Rhannu 7\left(-10+\sqrt{2}\right) â 98 i gael \frac{1}{14}\left(-10+\sqrt{2}\right).
\frac{1}{14}\left(-10\right)+\frac{1}{14}\sqrt{2}
Defnyddio’r briodwedd ddosbarthu i luosi \frac{1}{14} â -10+\sqrt{2}.
\frac{-10}{14}+\frac{1}{14}\sqrt{2}
Lluosi \frac{1}{14} a -10 i gael \frac{-10}{14}.
-\frac{5}{7}+\frac{1}{14}\sqrt{2}
Lleihau'r ffracsiwn \frac{-10}{14} i'r graddau lleiaf posib drwy dynnu a chanslo allan 2.
Enghreifftiau
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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]
Hafaliad ar y pryd
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Gwahaniaethu
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Integreiddiad
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Terfynau
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}