Объяснение:
(k²+kh-2k-2h) / (k²+kh+2k+2h) - (6k+12)/(2k-4) =
=(k(k+h)-2(k+h)) /(k(k+h)+2(k+h)) - (6k+12)/(2k-4) =
=(k+h)(k-2) /((k+h)(k+2) - 6(k+2)/2(k-2) =
=(k-2)/(k+2) - 3(k+2)/(k-2) =
=(3,17-2)/(3,17+2) - 3(3,17+2)/(3,17-2) =
=1,17/5,17-3*5,17/1,17=
=(117/517)-(3*517/117)=(117²-3*517²)/(117*517)=-788178/60489
=((k-2)²-3(k+2)²)/((k+2)(k-2))=
=(k²-4k+4-3k²-12k-12)/(k²-4)=
=(-2k²-16k-8)/(k²-4)=
Объяснение:
(k²+kh-2k-2h) / (k²+kh+2k+2h) - (6k+12)/(2k-4) =
=(k(k+h)-2(k+h)) /(k(k+h)+2(k+h)) - (6k+12)/(2k-4) =
=(k+h)(k-2) /((k+h)(k+2) - 6(k+2)/2(k-2) =
=(k-2)/(k+2) - 3(k+2)/(k-2) =
=(3,17-2)/(3,17+2) - 3(3,17+2)/(3,17-2) =
=1,17/5,17-3*5,17/1,17=
=(117/517)-(3*517/117)=(117²-3*517²)/(117*517)=-788178/60489
=((k-2)²-3(k+2)²)/((k+2)(k-2))=
=(k²-4k+4-3k²-12k-12)/(k²-4)=
=(-2k²-16k-8)/(k²-4)=