Question

(\(\left(-\dfrac{2}{3}\right)\) + \(\dfrac{3}{4}\))² x \(\dfrac{12}{5}\) - \(\dfrac{1}{5}\)

Answer 1

`( (-2/3) + 3/4 )^2 . 12/5-1/5`

`=(1/12)^2 . 12/5- 1/5`

`=1/60-1/5`

`=-11/60`

Answer 2

Lời giải:

\(\left[(\frac{-2}{3})+\frac{3}{4}\right]^2\times \frac{12}{5}-\frac{1}{5}\\ =(\frac{1}{12})^2\times \frac{12}{5}-\frac{1}{5}\\ =\frac{1}{60}-\frac{1}{5}=\frac{-11}{60}\)