`3x²+10x+3x=0`
`⇔3x²+13x=0`
`⇔x(3x+13)=0`
`⇔x=0` hoặc `x=-(13)/3`
`x³-4x²+3x=0`
`⇔x³-x²-3x²+3x=0`
`⇔x²(x-1)-3x(x-1)=0`
`⇔(x-1)(x²-3x)=0`
`⇔(x-1)[x(x-3)]=0`
`⇔(x-1)x(x-3)=0`
`⇔x=1` hoặc `x=0` hoặc `x=3`
`2x³-7x²+3x=0`
`⇔2x³-x²-6x²+3x=0`
`⇔x²(2x-1)-3x(2x-1)=0`
`⇔(2x-1)(x²-3x)=0`
`⇔(2x-1)x(x-3)=0`
`⇔x=1/2` hoặc `x=0` hoặc `x=3`
`x³-3x²-4x=0`
`⇔(x-4)(x+1)=0`
`⇔x=4` hoặc `x=-1`
`2x³-6x²+x=0`
`⇔x(2x-3-√7)(2x-3+√7)=0`
`⇔x=0` hoặc `x=(3+√7)/2` hoặc `x=(3-√7)/2`
