Найдите значение выражения: –(3x-5)/(4-c^2)+(3-2c)/(c^2-4) при c=3; c=-3.

\[- \ \frac{3c - 5}{4 - c^{2}} + \frac{3 - 2c}{c^{2} - 4} =\]

\[= \frac{3c - 5}{c^{2} - 4} + \frac{3 - 2c}{c^{2} - 4} =\]

\[= \frac{3c - 5 + 3 - 2c}{c^{2} - 4} =\]

\[= \frac{c - 2}{(c - 2)(c + 2)} = \frac{1}{c + 2}\]

\[c = 3:\]

\[\frac{1}{c + 2} = \frac{1}{3 + 2} = \frac{1}{5} = 0,2.\]

\[c = - 3:\]

\[\frac{1}{c + 2} = \frac{1}{- 3 + 2} = \frac{1}{- 1} = - 1.\]