Question

номер302 решите позазя

Answer 1

$frac{3b^2}{a^2-81b^2}: frac{b}{a^2-9ab}= frac{3b^2}{(a-9b)(a+9b)}cdot frac{a(a-9b)}{b}= frac{3ab}{a+9b}$

Answer 2

=3ab/(a+9b)
. . . . . . . . . . . .