Question

Найдите значения выражения пж

Answer 1

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