Найду корень уравнения: x^5-x-1=0
x1 = 1.16730397826142
x2 = -0.764884433600585 - 0.352471546031726*I
x3 = -0.764884433600585 + 0.352471546031726*I
x4 = 0.181232444469875 - 1.08395410131771*I
x5 = 0.181232444469875 + 1.08395410131771*I
сумма
0 + 1.16730397826142 + -0.764884433600585 - 0.352471546031726*I + -0.764884433600585 + 0.352471546031726*I + 0.181232444469875 - 1.08395410131771*I + 0.181232444469875 + 1.08395410131771*I
=
1.66533453693773e-16
произведение
1*1.16730397826142*(-0.764884433600585 - 0.352471546031726*I)*(-0.764884433600585 + 0.352471546031726*I)*(0.181232444469875 - 1.08395410131771*I)*(0.181232444469875 + 1.08395410131771*I)
=
1.00000000000000
x1 = 0.181232444469875 - 1.08395410131771*i
x2 = 0.181232444469875 + 1.08395410131771*i
x3 = 1.16730397826142
x4 = -0.764884433600585 - 0.352471546031726*i
x5 = -0.764884433600585 + 0.352471546031726*i