Question

Представь квадрат двучлена в виде многочлена

Answer 1

$( \frac{9}{10} - \frac{1}{8} {u}^{8} )^{2} = \\ = \frac{81}{100} - 2 \times \frac{9}{10} \times \frac{1}{8} {u}^{8} + \frac{1}{64} {u}^{16} = \\ = \frac{81}{100} - \frac{9}{40} {u}^{8} + \frac{1}{64} {u}^{16}$