Asked by Han

Determine the real roots of the polynomial equation: (x^2+1)(x-4)=0
Answered by bobpursley
real roots? x=4.
imaginary roots? x=+-sqrt(-1)
Answered by Han
ok thanks but how do you know if the roots are imaginary or not?
Answered by Ashley
They are imaginary because a negative number cannot be square rooted.
Answered by Han
ok thanks :D