1) у(3у+7)=0
y₁ = 0 ;
3y + 7 = 0,
y₂ = - 7/3
y₂ = - 2 (1/3)
2) -2х(х-4)=0
- 2x = 0, x₁ = 0
x - 4 = 0,
x₂ = 4
3) у(у+3)(у-6)=0
y = 0,
y₁ = 0
y + 3 = 0, y₂ = - 3
y - 6 = 0,
y₃ = 6
4) (1-х)(3х-2)(х+5)=0
1 - x = 0,
x₁ = 1
3x - 2 = 0,
3x = 2,
x₂ = 2/3
x + 5 = 0,
x₃ = - 5
5) z(2-z)(3-2z)=0
z = 0, z₁ = 0
2 - z = 0, z₂ = 2
3 - 2z = 0,
- 2z = - 3,
z = 3/2
z = 1,5