Question

Помогите решить 1 вариант

Answer 1

1)
а)
$3 {a}^{2} b \times ( - 5 {a}^{3} b) = - 15 {a}^{5} {b}^{2}$
б)
$(2 {x}^{2} {y}^{3} )^{3} = 4 {x}^{6} {y}^{9}$
3)
а)
${a}^{2} b - {ab}^{2} = ab(a - b)$
б)
$9x - {x}^{3} = x(9 - {x}^{2} ) = \\ x(3 - x)(3 + x)$