Question

giải nhanh giúp mình nha

Answer 1

a) \(=\dfrac{3}{11}\left(-\dfrac{2}{3}-\dfrac{16}{9}\right)=\dfrac{3}{11}.\dfrac{-22}{9}=-\dfrac{2}{3}\)

b) \(=-\dfrac{3}{7}.\dfrac{7}{5}-\dfrac{1}{21}.\dfrac{7}{5}=\dfrac{7}{5}\left(-\dfrac{3}{7}-\dfrac{1}{21}\right)=\dfrac{7}{5}.\dfrac{-10}{21}=-\dfrac{2}{3}\)

c) \(=\dfrac{4}{9}.\left(-7\right)+\dfrac{59}{9}.\left(-7\right)=\left(-7\right)\left(\dfrac{4}{9}+\dfrac{59}{9}\right)=\left(-7\right)7=-49\)