Question

РЕШИТЕ ПОЖАЛУЙСТА ПЕРВЫЕ 3, УМОЛЯЮ БЫСТРЕЕ

Answer 1

Ответ:

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

$2) \: \frac{5x - 2}{x - 9} - \frac{4x + 7}{x - 9} = 0 \\ \frac{5x - 2 - 4x - 7}{x - 9} = 0 \\ \frac{x - 9}{x - 9} = 0 \\ x - 9 = 0 \\ x = 9$

$3) \: \frac{5}{x - 3} - \frac{2}{ {x}^{2} - 9} = 0 \\ \frac{5}{x - 3} - \frac{2}{(x - 3)(x + 3)} = 0 \\ \frac{5(x + 3) - 2}{(x + 3)(x - 3)} = 0 \\ \frac{5x + 15 - 2}{(x + 3)(x - 3)} = 0 \\ \frac{5x + 13}{ {x}^{2} - 9} = 0 \\ 5x + 13 = 0 \\ x = - \frac{13}{5} = - 2.6$