Question

Find the value of discriminant of the following equation.

2y² − y + 2 = 0

Answer 1

2y² − y + 2 = 0

For the quadratic equation,  ax² + bx + c = 0

D = b² − 4ac

Here, 

a = 2, b = −1, c = 2

D = (−1)² − 4 × 2 × 2

= 1 − 16

= −15