[tex]-2,4 \cdot(3,75-4\frac{2}{3})+(\frac{2}{5})^{2}=-\frac{24}{10}\cdot(\frac{375}{100}-\frac{14}{3})+\frac{4}{25} = -\frac{12}{5}\cdot(\frac{15}{4}-\frac{14}{3})+\frac{4}{25}=\\\\=-\frac{12}{5}\cdot(\frac{15}{4}-\frac{14}{3})+\frac{4}{25} = -\frac{12}{5}\cdot(\frac{45}{12}-\frac{56}{12})+\frac{4}{25} = -\frac{12}{5}\cdot(-\frac{11}{12})+\frac{4}{25} =\\\\=\frac{11}{5}+\frac{4}{25} = \frac{55}{25}+\frac{4}{25} = \frac{59}{25} = 2\frac{9}{5}\\\\Odp. \ b)[/tex]
