<span>х</span><span>³-3х</span><span>²-3х+9=0</span><span>x=√3</span><span>x₂=-√3</span>x₃=√3
1) 9m^2-(2m^2+1)^2
9m^2-(4m^4+4m^2+1)
9m^2-4m^4-4m^2-1
5m^2-4m^4-1
-4m^4+5m^2-1
2) 4-4y-y+y^2+y^2-y^3-y^5+y^6
4-5y+2y^2-y^3-y^5+y^6
y^6-y^5-y^3+2y^2-5y+4
3) (y^3-1)*(y^6+y^3+1)
y^9-1
3(83-8)/90=3(75/90)=3(5/6)
а) (х + 6)(х-6) > 0
(х + 6)(х-6) = 0
х=6 или х=-6
б)(х+25)(х-30) < 0
(х+25)(х-30) = 0
х=-25 или х=30
в)(х+0.1)(х+6,30 > или равно 0
(х+0.1)(х+6,30 = 0
х=-0,1 или х=-6,30