Enrhifo (complex solution)
\sqrt{21}i\approx 4.582575695i
Rhan Real (complex solution)
0
Enrhifo
\text{Indeterminate}
Rhannu
Copïo i clipfwrdd
\sqrt{21}i
Ffactora -21=21\left(-1\right). Ailysgrifennu ail isradd y lluoswm \sqrt{21\left(-1\right)} fel lluoswm ail israddau \sqrt{21}\sqrt{-1}. Drwy ddiffiniad, ail isradd -1 yw i.
Enghreifftiau
Hafaliad cwadratig
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Rhifyddeg
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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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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}