Question

Помогите пожалуйста.
Розв'язати рівняння:

Answer 1

Ответ:

4) неможливо

5) - 20

6) х=-3

х=3

Объяснение:

$\frac{10 - 3x + 5x + 6}{x + 8} = 0 \\ \frac{16 + 2x}{x + 8} = 0 \\ \frac{2x + 16}{x + 8} = 0 \\ \frac{2(x + 8)}{x + 8} = 0 \\ 2 = 0$

$\frac{3(x + 4) - 2(x - 4)}{(x - 4) \times (x + 4)} = 0 \\ \frac{3x + 12 - 2x + 8}{(x - 4) \times (x + 4)} = 0 \\ \frac{x + 20}{(x - 4) \times (x + 4)} = 0 \\ x + 20 = 0 \\ x = - 20$

$\frac{4}{x - 1} - \frac{4}{x + 4} - 1 = 0 \\ \frac{4(x + 1) - 4(x - 1) - (x - 1) \times (x + 1)}{(x - 1) \times (x + 1)} = 0 \\ 4(x + 1) - 4(x - 1) - (x - 1) \times (x + 1) = 0 \\ 4x + 4 - 4x + 4 - ({x}^{2} - 1) = 0 \\ 4 + 4 - {x}^{2} + 1 = 0 \\ 9 - {x}^{2} = 0 \\ - {x}^{2} = - 9 \\ {x}^{2} = 9 \\ x = - 3 \: \: x = 3$