It has two complex roots.
one
No real roots. Imaginary roots as this function does not intersect the X axis.
No real roots
The roots are: x = -5 and x = -9
No real roots.
Two. x = + i sqrt(8.4) x = - i sqrt(8.4)
x=16
y = x2-4x+4 Since the highest degree term is 2, it must have 2 roots
No real roots.
There are no real root. The complex roots are: [-5 +/- sqrt(-3)] / 2
x=-0.7