I have a polynomial

` p(x) = (x^5 + 1.3301x^4 - 9.1234x^3 + 1)(x^2 - 9976/1000)`

I need to find the roots preferably to the nearest 100,000th.

Here is what I do:

` p = [1 1.3301 -9.1234 0 0 1]; roots(p);`

my result is:

` -3.760932681080143 + 0.000000000000000i 2.416314783767116 + 0.000000000000000i 0.495523859135796 + 0.000000000000000i -0.240502980911384 + 0.405248700488689i -0.240502980911384 - 0.405248700488689i`

then I do:

` p = [1 0 9976/1000]; roots(p);`

my result is:

` -0.000000000000000 + 3.158480647399949i 0.000000000000000 - 3.158480647399949i`

I'm not really understanding my answers or if they are even correct. If someone could explain them I would appreciate it.

## Best Answer