valeriya1611 1)х^3-2x^2+2x^2-4x+4х+8-x(x^2-3x+3x-9)=26
x^3+8-x^3+9x-26=0
9x=26-8
x=2
2)x^3+3x^2+9x-3x^2-9x-27-x^3+16x-21=0
16x-48=0
x=3