Question

Thực hiện các phép chia:

a) \(20{x^3}{y^5}:\left( {5{x^2}{y^2}} \right)\)                                         

b) \(18{x^3}{y^5}:\left[ {3{{\left( { - x} \right)}^3}{y^2}} \right]\)

Answer 1

`a, 20x^3y^5 : 5x^2y^2`

`= (20:5)x^(3-2) . y^(5-2)`

`= 4xy^3`

`b, 18x^3y^5 : (3(-x^3)y^2)`

`= -(18:3)y^(5-3)`

`= -6y^2`