Datrys r+2/r(r+3)-r-1/r(r+2)

$$\frac { r + 2 } { r ( r + 3 ) } - \frac { r - 1 } { r ( r + 2 ) }$$

Enrhifo

$$\frac{2r+7}{r\left(r+2\right)\left(r+3\right)}$$

Camau Ateb Byr

I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Lluosrif lleiaf cyffredin r\left(r+3\right) a r\left(r+2\right) yw r\left(r+2\right)\left(r+3\right). Lluoswch \frac{r+2}{r\left(r+3\right)} â \frac{r+2}{r+2}. Lluoswch \frac{r-1}{r\left(r+2\right)} â \frac{r+3}{r+3}.

$$\frac{\left(r+2\right)\left(r+2\right)}{r\left(r+2\right)\left(r+3\right)}-\frac{\left(r-1\right)\left(r+3\right)}{r\left(r+2\right)\left(r+3\right)}$$

Gan fod gan \frac{\left(r+2\right)\left(r+2\right)}{r\left(r+2\right)\left(r+3\right)} a \frac{\left(r-1\right)\left(r+3\right)}{r\left(r+2\right)\left(r+3\right)} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$\frac{\left(r+2\right)\left(r+2\right)-\left(r-1\right)\left(r+3\right)}{r\left(r+2\right)\left(r+3\right)}$$

Gwnewch y gwaith lluosi yn \left(r+2\right)\left(r+2\right)-\left(r-1\right)\left(r+3\right).

$$\frac{r^{2}+2r+2r+4-r^{2}-3r+r+3}{r\left(r+2\right)\left(r+3\right)}$$

Cyfuno termau tebyg yn r^{2}+2r+2r+4-r^{2}-3r+r+3.

$$\frac{2r+7}{r\left(r+2\right)\left(r+3\right)}$$

Ehangu r\left(r+2\right)\left(r+3\right).

$$\frac{2r+7}{r^{3}+5r^{2}+6r}$$

Ehangu

$$\frac{2r+7}{r\left(r+2\right)\left(r+3\right)}$$

Camau Ateb Byr

I ychwanegu neu dynnu mynegiannau, rhaid i chi eu ehangu i wneud eu enwaduron yr un fath. Lluosrif lleiaf cyffredin r\left(r+3\right) a r\left(r+2\right) yw r\left(r+2\right)\left(r+3\right). Lluoswch \frac{r+2}{r\left(r+3\right)} â \frac{r+2}{r+2}. Lluoswch \frac{r-1}{r\left(r+2\right)} â \frac{r+3}{r+3}.

$$\frac{\left(r+2\right)\left(r+2\right)}{r\left(r+2\right)\left(r+3\right)}-\frac{\left(r-1\right)\left(r+3\right)}{r\left(r+2\right)\left(r+3\right)}$$

Gan fod gan \frac{\left(r+2\right)\left(r+2\right)}{r\left(r+2\right)\left(r+3\right)} a \frac{\left(r-1\right)\left(r+3\right)}{r\left(r+2\right)\left(r+3\right)} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$\frac{\left(r+2\right)\left(r+2\right)-\left(r-1\right)\left(r+3\right)}{r\left(r+2\right)\left(r+3\right)}$$

Gwnewch y gwaith lluosi yn \left(r+2\right)\left(r+2\right)-\left(r-1\right)\left(r+3\right).

$$\frac{r^{2}+2r+2r+4-r^{2}-3r+r+3}{r\left(r+2\right)\left(r+3\right)}$$

Cyfuno termau tebyg yn r^{2}+2r+2r+4-r^{2}-3r+r+3.

$$\frac{2r+7}{r\left(r+2\right)\left(r+3\right)}$$

Ehangu r\left(r+2\right)\left(r+3\right).

$$\frac{2r+7}{r^{3}+5r^{2}+6r}$$