Thực hiện các phép tính sau: a, ( 1/2a^2x^4 + 4/3ax^3 - 2/3ax^2 ):( - 2/3ax^2 )

a) Ta có: ( $\frac{1}{2}$a²x⁴ + $\frac{4}{3}$ax³ -$\frac{2}{3}$ax² ):( - $\frac{2}{3}$ax² )

= ( $\frac{1}{2}$a²x⁴: - $\frac{2}{3}$ax² ) + ( $\frac{4}{3}$ax³: - $\frac{2}{3}$ax² ) + ( - $\frac{2}{3}$ax²: - $\frac{2}{3}$ax² )

= - $\frac{3}{4}$ax² - 2x + 1