Enrhifo
\frac{3\sqrt{217}}{56}\approx 0.789156421
Rhannu
Copïo i clipfwrdd
\frac{\sqrt{279}}{\sqrt{448}}
Ailysgrifennu ail isradd y rhaniad \sqrt{\frac{279}{448}} fel rhaniad ail israddau \frac{\sqrt{279}}{\sqrt{448}}.
\frac{3\sqrt{31}}{\sqrt{448}}
Ffactora 279=3^{2}\times 31. Ailysgrifennu ail isradd y lluoswm \sqrt{3^{2}\times 31} fel lluoswm ail israddau \sqrt{3^{2}}\sqrt{31}. Cymryd isradd 3^{2}.
\frac{3\sqrt{31}}{8\sqrt{7}}
Ffactora 448=8^{2}\times 7. Ailysgrifennu ail isradd y lluoswm \sqrt{8^{2}\times 7} fel lluoswm ail israddau \sqrt{8^{2}}\sqrt{7}. Cymryd isradd 8^{2}.
\frac{3\sqrt{31}\sqrt{7}}{8\left(\sqrt{7}\right)^{2}}
Mae'n rhesymoli enwadur \frac{3\sqrt{31}}{8\sqrt{7}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{7}.
\frac{3\sqrt{31}\sqrt{7}}{8\times 7}
Sgwâr \sqrt{7} yw 7.
\frac{3\sqrt{217}}{8\times 7}
I luosi \sqrt{31} a \sqrt{7}, dylid lluosi'r rhifau dan yr ail isradd.
\frac{3\sqrt{217}}{56}
Lluosi 8 a 7 i gael 56.
Enghreifftiau
Hafaliad cwadratig
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometreg
4 \sin \theta \cos \theta = 2 \sin \theta
Hafaliad llinol
y = 3x + 4
Rhifyddeg
699 * 533
Matrics
\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
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Gwahaniaethu
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integreiddiad
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Terfynau
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}