Prove that the equation `8x^2+8xy+2y^2+26x+13y+15=0` represents a pair of parallel straight lines . Also find the perpendicular distance between them .

Prove that the equation 2x^(2)+3xy-2y^(2)-x+3y-1=0 represents a pair of perpendicular straight lines.

The equation 8x^2 +8xy +2y^2+26x +13y+15=0 represents a pair of straight lines. The distance between them is

Show that the following equations represents a pair of parallel lines and also find the distance between them. Show that the equation 8x^(2)-24xy+18y^(2)-6x+9y-5=0 represents a pair of parallel lines and find the distance between them.

The equation 8x^2+8xy+2y^2+26x+13y+15=0 represents a pair of straight lines. The distance between them is

Show that 9x^2+24xy+16y^2+21x + 28y+ 6 =0 represents a pair of parallel straight lines and find the distance between them .