Question

Спростіть вираз x²-9/27x² * 9x/x-3

Answer 1

$\frac{(x-3)(x+3)}{27x^{2} } * \frac{9x}{x - 3} = \frac{(x+3) * 9x}{27x^{2} } = \frac{(x+3)}{3x}$

Answer 2

Ответ:

Объяснение:

$x^2 - 9 = (x-3)(x+3)\\\\\frac{(x-3)(x+3)}{27x^2}*\frac{9x}{x-3} = \frac{9x(x-3)(x+3)}{(27x^2)(x-3)} = \frac{9x(x+3)}{27x^2} = \frac{x(x+3)}{3x^2} = \frac{x+3}{3x}$