Question

Find the roots of the quadratic equation 2x² – √5x – 2 = 0 using the quadratic formula.

Answer 1

b² – 4ac 

= 5 – 4 × 2 × (–2) 

= 21 

Therefore, the roots are (√5 + - √21)/4, i.e., (√5 +  √21)/4 and (√5 - √21)/4.