AP EAMCET Engineering 21 Apr 2019 Shift 2 Paper

The pair of the lines represented by the given equat ion will be
perpendicular to each other, when
Coefficient of x2+ coefficient of y2=0
Now,
3a+a2−2=0
On solving the above quadratic equation,
a=‌

−3±√17

2

There are two values.