1. x^3-x^2=0
2. x^6-4x^3+4=0
3. x^2-25=0

1. x³-x²=0  x²(x-1)=0 x²= 0 или x-1=0 x₁=0x₂=1 2. x⁶-4x³+4=0(x³-2)²=0 x³-2=0x³=2 x=³√2 3. x²-25=0x²=25 x₁=5 x₂=-5