Question

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

Answer 1

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