Question

Determine the nature of line represented by $x^2-y^2=0$.

Answer 1

$\begin{array}{c}{x}^2-y^2=0\\ -a{x}^2+2hxy+b{y}^2=0\\ a=1,h=0,b=-1\\ h^2-ab\\ 0-\left(1\right)\left(-1\right)\\ 1\\ h^2-ab>0p\\ real\&distict\end{array}$