Question

даю 50 б
спростіть вираз 3/x-3 - x+15/x²-9 - 2/x

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Answer 1

Ответ:

$\frac{3}{x} - 3 - x + \frac{15}{x {}^{2} } - 9 - \frac{2}{x} = \\ = \frac{x {}^{2} \times 3 }{ x} - 3 \times x {}^{2} - x \times x {}^{2} + \\ + \frac{x {}^{2} \times 15 }{x {}^{2} } - 9 \times x {}^{2} - \frac{2 \times x {}^{2} }{x} = \\ = 3x - 3x {}^{2} - x {}^{3} + 15 - 9x {}^{2} - 2x = \\ = x - 12x {}^{2} - x {}^{3 } + 15$