Ответ:

[tex]2x \times xy = 2 {x}^{2} y \\ 5mn \times 3mn = 15 {m}^{2} {n}^{2} \\ - a {b}^{2} \times {a}^{2} b = - {a}^{3} {b}^{3} \\ 7.2 {x}^{4} \times \frac{1}{9} {x}^{5} y = 0.8 {x}^{9} y \\ 2 \frac{1}{6} {a}^{3} {c}^{4} \times 3 {a}^{4} = 6.5 {a}^{7} {c}^{4} \\ - 10a {b}^{2} \times ( - 3b) = 30a {b}^{3} \\ 0.5 {m}^{3} {n}^{6} \times 0.08 {m}^{6} {n}^{3} = 0.04 {m}^{9} {n}^{9} \\ - 1.2acb \times ( - \frac{3}{4} xyz) = 0.9acbxyz[/tex]