Enrhifo
3\sqrt{2}\approx 4.242640687
Rhannu
Copïo i clipfwrdd
\sqrt{3^{2}+\left(4-7\right)^{2}}
Tynnu 1 o 4 i gael 3.
\sqrt{9+\left(4-7\right)^{2}}
Cyfrifo 3 i bŵer 2 a chael 9.
\sqrt{9+\left(-3\right)^{2}}
Tynnu 7 o 4 i gael -3.
\sqrt{9+9}
Cyfrifo -3 i bŵer 2 a chael 9.
\sqrt{18}
Adio 9 a 9 i gael 18.
3\sqrt{2}
Ffactora 18=3^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{3^{2}\times 2} fel lluoswm ail israddau \sqrt{3^{2}}\sqrt{2}. Cymryd isradd 3^{2}.
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}