Question

Срочно помогите, домашку скинуть надо через 50 минут!!! 3 и 5 номера, срочно!!!!!!!!!!!

Answer 1

Відповідь:

+

Пояснення:

Answer 2

$a) \frac{x + 8}{x} = \frac{6}{x - 2} \: \: x≠0.x≠2 \\ (x + 8)(x - 2) =6x \\ \\ x {}^{2} - 2x + 8x - 16 = 6x \\ x {}^{2} + 6x - 16 = 6x \\ x {}^{2} - 16 = 0 \\ x {}^{2} = 16 \\ x = ±4 \\ x1 = - 4 \\ x2 = 4$

уравнения имеет 2 решения

$b) \frac{4}{x - 1} - \frac{4}{x + 1} = 1 \\ \\ \frac{4}{x - 1} - \frac{4}{x + 1} = 0 \\ \\ \frac{4(x + 1) - 4(x - 1) - (x - 1) \times (x + 1)}{(x - 1)(x + 1)} = 0 \\ \\ 4x + 4 - 4x + 4 - (x {}^{2} - 1) = 0 \\ 4 + 4 - x {}^{2} + 1 = 0 \\ 9 - x {}^{2} = 0 \\ - x {}^{2} = - 9 \\ x {}^{2} = 9 \\ x = ±3 \\ x1 = - 3 \\ x2 = 3$

5)(x+2)(x-10)=0

x+2=0

x-10=0

x Є (-∞ ;-2) U (-2:10) U (10, +∞)