(m²-10m+27)/(m-5)=(m²-10m+25)/(m-5)+2/(m-5)=(m-5) +2/(m-5)
m=3 -2-1=-3
m=4 -1-2=-3
m=6 1+2=3
m=7 2+1=3
a^2+4ab+3b^2
----------------------- = 3а^2 +11ab+6b^2
2a^2+7ab+3b^2
вродебы так .там складываем
А/(a-b) - b/a - 1 = (a*a-b(a-b)-1(a(a-b))/(a(a-b)) = (a²-ab+b²-a²+ab)/(a(a-b)) = b²/(a²-ab)