Question

The roots of the quadratic equation x² + x - 1 = 0 are 

A) Irrational and distinct 

B) not real 

C) rational and distinct 

D) real and equal

Answer 1

Correct option is (A) Irrational and distinct 

Explanation:

Here a = 1, b = 1, c = -1

Discriminant (D) = b² - 4ac

                            = (1)² - 4.1 (-1)

                            = 1 + 4

                            = 5

Therefore, the roots of the quadratic equation x² + x - 1 = 0 are irrational and distinct.