\(\dfrac{6}{3^2}\) hay \(\left(\dfrac{6}{3}\right)^2\) vậy bạn?
\(\dfrac{6}{3^2}\) - \(\dfrac{3}{2}\)
= \(\dfrac{6}{9}\) - \(\dfrac{3}{2}\)
= \(\dfrac{12}{18}\) - \(\dfrac{27}{18}\)
= - \(\dfrac{15}{18}\)
\(\left(\dfrac{6}{3}\right)\)2 - \(\dfrac{3}{2}\)
= 22 - \(\dfrac{3}{2}\)
= 4 - \(\dfrac{3}{2}\)
= \(\dfrac{8}{2}\) - \(\dfrac{3}{2}\)
= \(\dfrac{5}{2}\)