Luacháil
\frac{2\left(7-15x\right)}{x^{2}-49}
Fairsingigh
-\frac{2\left(15x-7\right)}{x^{2}-49}
Graf
Tráth na gCeist
Polynomial
5 fadhbanna cosúil le:
\frac { x - 9 } { x + 7 } - \frac { x + 7 } { x - 7 }
Roinn
Cóipeáladh go dtí an ghearrthaisce
\frac{\left(x-9\right)\left(x-7\right)}{\left(x-7\right)\left(x+7\right)}-\frac{\left(x+7\right)\left(x+7\right)}{\left(x-7\right)\left(x+7\right)}
Chun cothromóidí a shuimiú nó a dhealú, fairsingigh iad chun a n-ainmneoirí a mheaitseáil. Is é an t-iolrach is lú coitianta de x+7 agus x-7 ná \left(x-7\right)\left(x+7\right). Méadaigh \frac{x-9}{x+7} faoi \frac{x-7}{x-7}. Méadaigh \frac{x+7}{x-7} faoi \frac{x+7}{x+7}.
\frac{\left(x-9\right)\left(x-7\right)-\left(x+7\right)\left(x+7\right)}{\left(x-7\right)\left(x+7\right)}
Tá an t-ainmneoir céanna ag \frac{\left(x-9\right)\left(x-7\right)}{\left(x-7\right)\left(x+7\right)} agus \frac{\left(x+7\right)\left(x+7\right)}{\left(x-7\right)\left(x+7\right)} agus, mar sin, is féidir iad a dhealú trína n-uimhreoirí a dhealú.
\frac{x^{2}-7x-9x+63-x^{2}-7x-7x-49}{\left(x-7\right)\left(x+7\right)}
Déan iolrúcháin in \left(x-9\right)\left(x-7\right)-\left(x+7\right)\left(x+7\right).
\frac{-30x+14}{\left(x-7\right)\left(x+7\right)}
Cumaisc téarmaí comhchosúla in: x^{2}-7x-9x+63-x^{2}-7x-7x-49.
\frac{-30x+14}{x^{2}-49}
Fairsingigh \left(x-7\right)\left(x+7\right)
\frac{\left(x-9\right)\left(x-7\right)}{\left(x-7\right)\left(x+7\right)}-\frac{\left(x+7\right)\left(x+7\right)}{\left(x-7\right)\left(x+7\right)}
Chun cothromóidí a shuimiú nó a dhealú, fairsingigh iad chun a n-ainmneoirí a mheaitseáil. Is é an t-iolrach is lú coitianta de x+7 agus x-7 ná \left(x-7\right)\left(x+7\right). Méadaigh \frac{x-9}{x+7} faoi \frac{x-7}{x-7}. Méadaigh \frac{x+7}{x-7} faoi \frac{x+7}{x+7}.
\frac{\left(x-9\right)\left(x-7\right)-\left(x+7\right)\left(x+7\right)}{\left(x-7\right)\left(x+7\right)}
Tá an t-ainmneoir céanna ag \frac{\left(x-9\right)\left(x-7\right)}{\left(x-7\right)\left(x+7\right)} agus \frac{\left(x+7\right)\left(x+7\right)}{\left(x-7\right)\left(x+7\right)} agus, mar sin, is féidir iad a dhealú trína n-uimhreoirí a dhealú.
\frac{x^{2}-7x-9x+63-x^{2}-7x-7x-49}{\left(x-7\right)\left(x+7\right)}
Déan iolrúcháin in \left(x-9\right)\left(x-7\right)-\left(x+7\right)\left(x+7\right).
\frac{-30x+14}{\left(x-7\right)\left(x+7\right)}
Cumaisc téarmaí comhchosúla in: x^{2}-7x-9x+63-x^{2}-7x-7x-49.
\frac{-30x+14}{x^{2}-49}
Fairsingigh \left(x-7\right)\left(x+7\right)
Samplaí
Cothromóid chearnach
{ x } ^ { 2 } - 4 x - 5 = 0
Triantánacht
4 \sin \theta \cos \theta = 2 \sin \theta
Cothromóid líneach
y = 3x + 4
Uimhríocht
699 * 533
Maitrís
\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]
Cothromóid chomhuaineach
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Difreáil
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Comhtháthú
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Teorainneacha
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}