Does equation `x^2+2y^2-2sqrt(3)x-4y+5=0` satisfies the condition `a b c+2gh-af^2-bg^2-c h^2=0?` Does it represent a pair of straight lines?

Does equation x^(2)+2y^(2)-2sqrt(3)x-4y+5=0 satisfies the condition abc+2gh-af^(2)-bg^(2)-ch^(2)=0? Does it represent a pair of straight lines?

Does x^(2)+y^(2)=0 represent a pair of straight lines

a(x^(2)-y^(2))+xy=0 represents a pair of straight lines for

a(x^(2)-y^(2))+xy=0 represents a pair of straight lines for

The condition that the equation ax^2+by^2+c(x+y)=0 to represents a pair of straight lines is

The condition that the equation ax^(2)+by^(2)+c(x+y)=0 to represents a pair of straight lines is

If the equation 3x^(2)-2y^(2)+lamda xy -x+5y-2=0 represents a pair of straight lines then lamda=

If the equation 3x^(2)-2y^(2)+lamda xy -x+5y-2=0 represents a pair of straight lines then lamda=