4) $\frac{(4\sqrt{7})^2}{10}-\frac{(2\sqrt{7})^2}{5}$

Question

Вопрос: $Фото задания: 4) $\frac{(4\sqrt{7})^2}{10}-\frac{(2\sqrt{7})^2}{5}$$ Фото задания

Accepted Answer

$(4\sqrt{7})^2=112$, а $(2\sqrt{7})^2=28$.

\[\frac{112}{10}-\frac{28}{5}=\frac{56}{5}-\frac{28}{5}=\frac{28}{5}.\]

Ответ: $\frac{28}{5}$.

4) \(\frac{(4\sqrt{7})^2}{10}-\frac{(2\sqrt{7})^2}{5}\)