Question

Which of the following are quadratic equation in x? 

`x - 6/x = 3`

Answer 1

`x - 6/x = 3` 

⇒ x² – 6 = 3x 

⇒ x² – 3x – 6 = 0 

(x³ – 3x – 6) is not quadratic polynomial; therefore, the given equation is quadratic.