Question

Номер 7 плиз очень надо

Answer 1

$\frac{8ab}{a+8b} * (\frac{a}{8b} - \frac{8b}{a} ) = \frac{8ab}{a+8b} * ( \frac{ a^{2}-64 b^{2} }{8ab} ) = \frac{8ab}{a+8b} * (\frac{(a-8b)*(a+8b)}{8ab} ) = a-8b$