If the sum of the slopes of the lines given by `x^(2) – 2cxy – 7y^(2) = 0` is four times their product, then c has the value

The slope of the line 3x+2y-7=0 is :

If one of the line given by 6x^(2)-xy+4cy^(2)=0 is 3x+4y=0 , then c equals to

The slope of one of the straight lines ax^(2)+2hxy+by^(2)=0 is three times the other, show that 3h^(2)=4ab .

The slope of the straight line 2y=x+8 is ___.

If the gradient of one of the lines x^(2)+hxy+2y^(2)=0 twice that of the other , then sum of possible values of h ____________.

If one of the lines given by the equation 2x^(2)+pxy+3y^(2)=0 coincide with one of those given by 2x^(2)+qxy-3y^(2)=0 and the other lines represented by them are perpendicular , then value of p+q is