Question

Решите пж 2 и 3 пример:

Answer 1

$displaystyle 4)..frac{a^{2}-6a+9}{a^{2}-4}: frac{2a-6}{a+2}*(a-2)^{2}= frac{(a-3)^{2} }{(a-2)(a+2)}* frac{(a+2)(a-2)^{2}}{2(a-3)}= \ \= frac{(a-3)(a-2)}{2}=0,5a^{2}-2,5a+6; \ \ 3).. frac{2}{4 x^{2}-y^{2}}* frac{y-2x}{4x}= frac{y-2x}{2x(2x-y)(2x+y)}=- frac{1}{2x(2x+y)}= \ \ =-frac{1}{4x^{2}+2xy}; \ \ 2).. frac{ax-xy}{a}: frac{a^{2}-ay}{x}= frac{x(a-y)}{a}* frac{x}{a(a-y)}=frac{ x^{2}}{a^{2} };$