Question

помогите пж 7 класс алгебра дам все 30 баллов

Answer 1

$\displaystyle\bf\\\Bigg(\frac{5}{6} -\frac{1}{4} u^{6} \Bigg)^{2} =\Bigg(\frac{5}{6} \Bigg)^{2} -2\cdot\frac{5}{6} \cdot\frac{1}{4}u^{6} +\Bigg(\frac{1}{4} u^{6} \Bigg)^{2} =\frac{25}{36} -\frac{5}{12} u^{6} +\frac{1}{16} u^{12}$

$\displaystyle\bf\\Otvet: \ \frac{1}{16} u^{12} -\frac{5}{12} u^{6} +\frac{25}{36}$