/9 - c -9 + d\
c*d*|----- + ------|
\ c d /
--------------------
2 2
d - c
$$\frac{c d \left(\frac{d - 9}{d} + \frac{- c + 9}{c}\right)}{- c^{2} + d^{2}}$$
c*d*((9 - c)/c + (-9 + d)/d)/(d^2 - c^2)
/9 - c -9 + d\
c*d*|----- + ------|
\ c d /
--------------------
2 2
d - c
$$\frac{c d \left(\frac{d - 9}{d} + \frac{- c + 9}{c}\right)}{- c^{2} + d^{2}}$$
c*d*((9 - c)/c + (-9 + d)/d)/(d^2 - c^2)
Объединение рациональных выражений
[src]
c*(-9 + d) - d*(-9 + c)
-----------------------
2 2
d - c
$$\frac{c \left(d - 9\right) - d \left(c - 9\right)}{- c^{2} + d^{2}}$$
(c*(-9 + d) - d*(-9 + c))/(d^2 - c^2)
Рациональный знаменатель
[src]
9*c 9*d
- ------- + -------
2 2 2 2
d - c d - c
$$- \frac{9 c}{- c^{2} + d^{2}} + \frac{9 d}{- c^{2} + d^{2}}$$
c*(-9 + d) + d*(9 - c)
----------------------
2 2
d - c
$$\frac{c \left(d - 9\right) + d \left(- c + 9\right)}{- c^{2} + d^{2}}$$
(c*(-9 + d) + d*(9 - c))/(d^2 - c^2)