(9/(m²-3m+9)+2m/(3+m)-(m³-15m²)/(m³+27)=
9/(m²-3m+9)+2m/(3+m)-(m³-15m²)/[(m+3)(m²-3m+9)]=
=(9m+27+2m³-6m²+18m-m³+15m²)/(m³+27)=
=(m³+9m²+27m+27)/(m³+27)=(m+3)³/[(m+3)(m²-3m+9)=(m+3)²/(m²-3m+9)
Уравненение этой прямой таково: х-2=0
1) cos720+tg 30 ctg 210+sin 120 = сos2*360° + tg30°ctg(180° + 30°) +
+ sin(90° + 30)° = 1 + 1/√3*ctg30° + sin30° = 1 + (1/√3)*(√3) + 1/2 = 1 + 1 + 1/2 = 2(1/2)
tg0 °- 2ctg90° - sin0° - 3cos90° = 0 - 2*0 - 0 - 3*0 = 0
4у-(3у-(2у+1))=4у-(3у-2у-1)=4у-(у-1)=4у-у+1=3у+1
3m-(3m+(3m-(m+3)))=3m-(3m+(3m-m-3))=3m-(3m+2m-3)=3m-(5m-5)=3m-5m-3=-2m-3