Question

срочно помогите решить, пожалуйста

Answer 1

$\frac{2 - 5m - 2n + 5mn}{10 {m}^{2} - 9m + 2 } = \\ = \frac{ 2(1 - n) - 5m(1 - n)}{10( {m}^{2} - 0.9m + 0.2)} = \\ = \frac{(n - 1)(5m - 2)}{10(m - 0.4)(m - 0.5)} = \\ = \frac{5(n - 1)(m - 0.4)}{10(m - 0.4)(m - 0.5)} = \\ = \frac{n - 1}{2m - 1}$