If one root of ax2+bx+c=0 where a,b,c are integers be 3+√5, then the other root is
3−√5
If one root of a quadratic equation with rational coefficients is irrational and of the form α + √β, then the other root must also be irrational and of the form α - √β.
Here, if one root of ax2+bx+c=0 where a,b,c are integers be 3+√5, then the other root is 3−√5