Question

Find x2-x-2 =0 has real roots or not

Answer 1

Step-by-step explanation:

The given equation is x² - x - 2 = 0

Here,

a = 1

b = -1

c = -2

If ∆ ≥ 0, the roots are real. If ∆ < 0, the roots are unreal.

∆ = b² - 4ac

= 1 - 4(1)(-2)

= 1 + 8

= 9

∆ > 0

The roots are real