Given: x2 + x – 8 = 0.
To find the nature of the roots, first we need to find the discriminant of the given quadratic equation.
We know that the discriminant of a quadratic equation is Δ = b2 – 4ac.
On comparing the given equation with ay2 + by + c = 0 in variable y, we get:
a = 1, b = and c = –8
Thus,
Δ = ( )2 – 4(1)(–8)
=> Δ = 18 + 32 = 50
Since Δ > 0, the roots of the given quadratic equation are real and unequal.