Question

$\frac{a^{2}-4ab+4b^{2} }{y^{6} }$·$\frac{y^{7} }{a^{2}-4b^{2} }$

Answer 1

Ответ:

$(a-2b)^{2} *\frac{y}{(a-2b)(a+2b)}$

$(a-2b)\frac{y}{a+2b}$

$\frac{ay-2by}{a+2b}$