Question

Найдите значение выражения

Answer 1

$(x - 1) \div \frac{ {x}^{2} - 2x + 1}{x + 1} = \\ = (x - 1) \div \frac{ {(x - 1)}^{2} }{x + 1} = \\ = (x - 1) \times \frac{x + 1}{ {(x - 1)}^{2} } = \\ = \frac{(x - 1)(x + 1)}{ {(x - 1)}^{2} } = \frac{x + 1}{x - 1} \\ x = - 99 \\ \frac{ - 99 + 1}{ - 99 - 1} = \frac{ - 98}{ - 100} = 0.98$