If the sum of the slopes of the lines given by `x^2-2cxy+7y^2=0` is 4 times their product; then find the value of c ?

If the sum of the slopes of the lines given by x^(2)-2cxy+7y^(2)=0 is 4 xx their product; then find the value of c?

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

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

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

If the sum of the slopes of the lines given by x^2-2c x y-7y^2=0 is four times their product, then the value of c is_____

If the sum of the slopes of the lines given by x^2-2c x y-7y^2=0 is four times their product, then the value of c is_____

If the sum of the slopes of the lines given by x^2-2c x y-7y^2=0 is four times their product, then the value of c is_____

If the sum of the slopes of the lines given by x^2-2c x y-7y^2=0 is four times their product, then the value of c is_____

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?