(x+6)*(2x-1)*(3x+12)=0
3x+12=0 => 3x=-12 =>x=-12/3 =>x=-4
x=-4
(x+6)*(2x-1)=0
2x²-x+12x-6=0
2x²+11x-6=0
D=11²-4*2*(-6)=169 √169=13
x=(-11+13)/2*2=0.5
x=(-11-13)/4=-6
x₁=-4
x₂=0.5
x₃=-6
m*(m-5)*(2m+1)=0
m=0, или m-5=0, или 2m+1=0
m₁=0
m₂=5 (m-5=0 => m=5)
m₃=-0.5 (2m+1=0 => 2m=-1 => m=-0.5)
m*(m-3)*(6+2m)=0
m=0
(m-3)*(6+2m)=0
6m+2m²-18-6m=0
2m²-18=0
2m²=18
m²=9
m=√9
m₁=0
m₂=3
m₃=-3