Question

ДАЮ 30 БАЛЛОВ! НЕ КЛИКБЕЙТ!!! ПОМОГИТЕ ПОЖАЛУЙСТА!!​

Answer 1

Ответ:

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Answer 2

$\frac{45}{x + 2} + \frac{45}{x - 2} - 14 = 0 \\ \frac{45(x - 2) + 45(x + 2) - 14(x + 2)(x - 2)}{(x + 2)(x - 2)} = 0 \\ \frac{45x - 90 + 45x + 90 - 14( {x}^{2} - 2x + 2x - 4) }{(x + 2)(x - 2)} = 0 \\ x + 2≠ 0 \\ x≠ - 2 \\ x - 2≠0 \\ x≠2 \\ \\ 90x - 14 {x}^{2} + 28x - 28x + 56 = 0 \\ - 14 {x}^{2} + 90x + 56 = 0 \\ 7 {x}^{2} - 45x - 28 = 0 \\ D = { ( - 45)}^{2} - 4 \times 7 \times ( - 28) = 2025 + 784 = 2809 \\ \sqrt{D} = \sqrt{2809} = 53 \\ x1 = \frac{45 + 53}{14} = \frac{98}{14} = 7 \\ x2 = \frac{45 - 53}{14} = \frac{ - 8}{14} = - \frac{4}{7}$