Question

Помогите пожалуйста! Очень-очень нужно..

Answer 1

а)

$- 20 {x}^{4} \times 0.5x {y}^{2} \times ( - 0.3) {x}^{2} {y}^{3} = 10 {x}^{5} {y}^{2} \times ( - 0.3) {x}^{2} {y}^{3} = - 3 {x}^{5 + 2} {y}^{2 + 3} = - 3 {x}^{7} {y}^{5}$

б)

$12 {x}^{2} {y}^{2} z \times ( - \frac{3}{4} )x {y}^{2} {z}^{2} \times ( - 0.1) {x}^{2} y {z}^{2} = - 9 {x}^{3} {y}^{4} {z}^{3} \times ( - 0.1) {x}^{2} y {z}^{2} = 0.9 {x}^{3 + 2} {y}^{5} {z}^{3 + 2} =0.9 {x}^{5} {y}^{5} {z}^{5}$