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)
${x}^{2} + {(3a)}^{2} = {x}^{2} + 9 {a}^{2}$