Răspuns :
4x⁵-6x³+2x=2x(2x⁴-3x²+1)=2x(2x⁴-2x²-x²+1)
2x[2x²(x²-1)-(x²-1)]=2x(x²-1)(2x²-1)=2x(x-1)(x+1)(2x²-1)
5x³+10x²+5x=5x(x²+2x+1)=5x(x+1)²
4x⁵-6x³+2x=2x(2x⁴-3x²+1)=2x(2x⁴-2x²-x²+1)
2x[2x²(x²-1)-(x²-1)]=2x(x²-1)(2x²-1)=2x(x-1)(x+1)(2x²-1)
5x³+10x²+5x=5x(x²+2x+1)=5x(x+1)²