3y2 – 7 = √3 y

(ix) 3y² – 7 = √3 y 

Sol. 3y² – 7 = √3 y

∴ 3y² – √3 y – 7 = 0

Here a = 3,  b = – √3 , c = –7 are real numbers

where a ≠ 0

So it is a quadratic equation in variable y.