Find all roots of the polynomial f(t)=t^4-5t^3+5t^2+17t-42.
f(t) = (t - 3)(t+2)(t^2 -4t +7)
Oh okay, thanks!
So would the answers be 3, -2,2-sqrt5 and 2+sqrt5..?
The first two are correct, but you need to look at the complex roots again.
