Question

Rút gọn
a. (3x3y² - 9x2y² + 15xy³) : 3xy² 
 

Answer 1

\(\left(3x^3y^2-9x^2y^2+15xy^3\right):3xy^2\)

\(=3x^3y^2:3xy^2-9x^2y^2:3xy^2+15xy^3:3xy^2\)

\(=\left(3:3\right)\cdot x^{3-1}\cdot y^{2-2}-\left(9:3\right)\cdot x^{2-1}\cdot y^{2-2}+\left(15:3\right)\cdot x^{1-1}\cdot y^{3-2}\)

\(=x^2-3x+5y\)