Найдите значения выражения:
1) [tex] \frac{4-7 x^{2} }{2-x} - \frac{6x^{2} }{2-x} [/tex]при x= - [tex] \frac{3}{4} [/tex]
2) [tex] \frac{5-3x}{25- x^{2} } + \frac{2x}{25- x^{2} } [/tex]при х= -1,5


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