Odpowiedź:
[tex]\huge\boxed{\boxed{(1\frac{2}{5})^2=1\frac{24}{25}}}[/tex]
[tex]\huge\boxed{\boxed{(2\frac{1}{2})^3=15\frac{5}{8}}}[/tex]
Szczegółowe wyjaśnienie:
Obliczenia
[tex](1\frac{2}{5})^2=(\frac{1\cdot5+2}{5})^2=(\frac{5+2}{5})^2=(\frac{7}{5})^2=\frac{7^2}{5^2}=\frac{7\cdot7}{5\cdot5}=\frac{49}{25}=1\frac{24}{25}\\\\(2\frac{1}{2})^3=(\frac{2\cdot2+1}{2})^3=(\frac{4+1}{2})^3=(\frac{5}{2})^3=\frac{5^3}{2^3}=\frac{5\cdot5\cdot5}{2\cdot2\cdot2}=\frac{125}{8}=15\frac{5}{8}[/tex]
Kroki rozwiązania