c c
----- - -----
a - c a + c
$$- \frac{c}{a + c} + \frac{c}{a - c}$$
Рациональный знаменатель
[src]c*(a + c) - c*(a - c)
---------------------
(a + c)*(a - c)
$$\frac{- c \left(a - c\right) + c \left(a + c\right)}{\left(a - c\right) \left(a + c\right)}$$
Объединение рациональных выражений
[src] 2
2*c
---------------
(a + c)*(a - c)$$\frac{2 c^{2}}{\left(a - c\right) \left(a + c\right)}$$
2
2*c
---------------
(a + c)*(a - c)$$\frac{2 c^{2}}{\left(a - c\right) \left(a + c\right)}$$
c c
----- - -----
a - c a + c
$$- \frac{c}{a + c} + \frac{c}{a - c}$$
2
2*c
---------------
(a + c)*(a - c)$$\frac{2 c^{2}}{\left(a - c\right) \left(a + c\right)}$$
$$\frac{2 c^{2}}{a^{2} - c^{2}}$$