Enrhifo
-\frac{4xy}{x^{2}-y^{2}}
Ehangu
-\frac{4xy}{x^{2}-y^{2}}
Rhannu
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\frac{\left(x-y\right)\left(x-y\right)}{\left(x+y\right)\left(x-y\right)}-\frac{\left(x+y\right)\left(x+y\right)}{\left(x+y\right)\left(x-y\right)}
I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Lluosrif lleiaf cyffredin x+y a x-y yw \left(x+y\right)\left(x-y\right). Lluoswch \frac{x-y}{x+y} â \frac{x-y}{x-y}. Lluoswch \frac{x+y}{x-y} â \frac{x+y}{x+y}.
\frac{\left(x-y\right)\left(x-y\right)-\left(x+y\right)\left(x+y\right)}{\left(x+y\right)\left(x-y\right)}
Gan fod gan \frac{\left(x-y\right)\left(x-y\right)}{\left(x+y\right)\left(x-y\right)} a \frac{\left(x+y\right)\left(x+y\right)}{\left(x+y\right)\left(x-y\right)} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.
\frac{x^{2}-xy-xy+y^{2}-x^{2}-xy-xy-y^{2}}{\left(x+y\right)\left(x-y\right)}
Gwnewch y gwaith lluosi yn \left(x-y\right)\left(x-y\right)-\left(x+y\right)\left(x+y\right).
\frac{-4xy}{\left(x+y\right)\left(x-y\right)}
Cyfuno termau tebyg yn x^{2}-xy-xy+y^{2}-x^{2}-xy-xy-y^{2}.
\frac{-4xy}{x^{2}-y^{2}}
Ehangu \left(x+y\right)\left(x-y\right).
\frac{\left(x-y\right)\left(x-y\right)}{\left(x+y\right)\left(x-y\right)}-\frac{\left(x+y\right)\left(x+y\right)}{\left(x+y\right)\left(x-y\right)}
I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Lluosrif lleiaf cyffredin x+y a x-y yw \left(x+y\right)\left(x-y\right). Lluoswch \frac{x-y}{x+y} â \frac{x-y}{x-y}. Lluoswch \frac{x+y}{x-y} â \frac{x+y}{x+y}.
\frac{\left(x-y\right)\left(x-y\right)-\left(x+y\right)\left(x+y\right)}{\left(x+y\right)\left(x-y\right)}
Gan fod gan \frac{\left(x-y\right)\left(x-y\right)}{\left(x+y\right)\left(x-y\right)} a \frac{\left(x+y\right)\left(x+y\right)}{\left(x+y\right)\left(x-y\right)} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.
\frac{x^{2}-xy-xy+y^{2}-x^{2}-xy-xy-y^{2}}{\left(x+y\right)\left(x-y\right)}
Gwnewch y gwaith lluosi yn \left(x-y\right)\left(x-y\right)-\left(x+y\right)\left(x+y\right).
\frac{-4xy}{\left(x+y\right)\left(x-y\right)}
Cyfuno termau tebyg yn x^{2}-xy-xy+y^{2}-x^{2}-xy-xy-y^{2}.
\frac{-4xy}{x^{2}-y^{2}}
Ehangu \left(x+y\right)\left(x-y\right).
Enghreifftiau
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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699 * 533
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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
\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}