5.
[tex]a)\\(-\frac{2}{7})^{2} = \frac{4}{49}\\\\(-\frac{3}{10})^{3} = -\frac{27}{1000}\\\\b)\\(-0,2)^{3} = -0,008\\\\(-0,15)^{2} = 0,0225\\\\c)\\(-3\frac{1}{3})^{3} = (-\frac{10}{3})^{3} = -\frac{1000}{27} = -37\frac{1}{27}\\\\(-2,5)^{2} = 6,25[/tex]
6.
[tex]a) \ \ -1,5^{2} = -2,25\\\\b) \ \ -\frac{1}{2^{3}} = -\frac{1}{8}\\\\c) \ \ -(1\frac{1}{4})^{2} = -(\frac{5}{4})^{2} = -\frac{25}{16} = -1\frac{9}{16}\\\\d) \ \ -\frac{2^{2}}{5} = -\frac{4}{5}\\\\e) \ \ -1^{2} = -1[/tex]
