Question

7x + 1. x- 11
---------- - ------- = 0
x + 4. x + 4

x. 49
-------- - ----------- = 0
x - 7. x^2 - 7x

Решите уравнение

Answer 1

Здравствуйте!

1)
$\frac{7x + 1 - x + 11}{x + 4} = 0 \\ \\ 6x + 12 = 0 \\ 6x = - 12 \\ x = - 2$
2)
$\frac{x {}^{2} - 49 }{x(x - 7)} = 0 \\ \\ \frac{(x - 7)(x + 7)}{x(x - 7)} = 0 \\ \\ \frac{x + 7}{x} = 0 \\ \\ x + 7 = 0 \\ x = - 7$
Удачи в учебе!