Question

1. 4(x-5)^4 - 5(x-5)^2 + 1=0
2. x^3 - 2x^2 - 8x=0
3. 3x^4 + x^3 - 12x^2 - 4x=0
4. x - корень из 5x + 6=0
5. x^4 - 4x^3 =0