Question

Помогите решить пожалуйста

Answer 1

1)
$\frac{x - {y}^{2} }{y - x} = \frac{0.5 - {( - 0.2)}^{2} }{ - 0.2 - 0.5} = \frac{0.5 - 0.04}{ - 0.7} = \frac{0.46}{ - 0.7} = - \frac{46}{100} \div \frac{7}{10} = - \frac{46}{100} \times \frac{10}{7} = - \frac{46}{70}$
2) а)
$0.15(x - y)$
б)
$2 \times (45 \times m) = 90m$
в)
${x}^{2} + {(3a)}^{2} = {x}^{2} + 9 {a}^{2}$