Ответ:
решение смотри на фотографии
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Объяснение:
1.
[tex] \frac{7}{a} + \frac{a - 7}{a + 5} = \frac{7a + 35 + {a}^{2} - 7a }{a(a + 5)} = \frac{ {a}^{2} + 35 }{a(a - 5)} [/tex]
2.
[tex] \frac{2{x}^{2} }{ {x}^{2} - 4 } - \frac{2x}{x +2} = \frac{2 {x}^{2} }{(x - 2)(x + 2)} - \frac{2x}{x +2} = \frac{ 2{x}^{2} - 2 {x}^{2} + 4x }{(x + 2)(x - 2)} = \frac{4x}{(x - 2)(x + 2)}[/tex]
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Verified answer
Ответ:
решение смотри на фотографии
Ответ:
**************************
Объяснение:
1.
[tex] \frac{7}{a} + \frac{a - 7}{a + 5} = \frac{7a + 35 + {a}^{2} - 7a }{a(a + 5)} = \frac{ {a}^{2} + 35 }{a(a - 5)} [/tex]
2.
[tex] \frac{2{x}^{2} }{ {x}^{2} - 4 } - \frac{2x}{x +2} = \frac{2 {x}^{2} }{(x - 2)(x + 2)} - \frac{2x}{x +2} = \frac{ 2{x}^{2} - 2 {x}^{2} + 4x }{(x + 2)(x - 2)} = \frac{4x}{(x - 2)(x + 2)}[/tex]