Find the roots of each of the following equations, if they exist, by applying the quadratic formula:

Question

Philoid · Accepted Answer

Given:

taking LCM

x² – 3x – 1 = 0 cross multiplying

Comparing with standard quadratic equation ax² + bx + c = 0

a = 1, b = – 3, c = – 1

Discriminant D = b² – 4ac

= (– 3)² – 4.1. – 1

= 9 + 4 = 13 > 0

Hence the roots of equation are real.

Roots are given by

Hence the roots of equation are