If abc=1, then the value of 1+a+b−11+1+b+c−11+1+c+a−11 is
The line through the points (h, 3) and (4, 1) intersects the line 7x−9y−19=0at right angle. Find the value of h.
Find the equation of the bisectors of the angles between the lines joining the origin to the point of intersection of the straight line x−y=2 with the curve 5x2+11xy−8y2+8x−4y+12=0
If the sum of the slopes of the lines given by x2−2cxy−7y2=0 is four times their product, then the value of c is_____
If the coordinates of the vertices of triangle ABC are (−1,6),(−3,−9) and (5,−8) , respectively, then find the equation of the median through C˙
Does equation x2+2y2−23x−4y+5=0 satisfies the condition abc+2gh−af2−bg2−ch2=0? Does it represent a pair of straight lines?