Question

СРОЧНЯЯЯЯЯЯЯК РЕБЯЯЯЯТ​

Answer 1

$1)\frac{x^{2}-y^{2}}{2xy}:\frac{3x-3y}{2y}=\frac{(x-y)(x+y)}{2xy}*\frac{2y}{3(x-y)} =\frac{x+y}{3x}$

$2)\frac{3a}{1-a^{2} }-\frac{2}{1-a}=\frac{3a}{(1-a)(1+a)}-\frac{2}{1-a}=\frac{3a-2-2a}{(1-a)(1+a)}=\frac{a-2}{1-a^{2} }$