The value of k, so that the equation `-2x^2 + xy + y^2 - 5x + y + k = 0` may represent straight line is

The value of k such that 3x^(2) - 11xy + 10 y^(2) - 7x + 13 y+ k = 0 may represent a pair of straight lines is :

Find the value of k, if the equation 2x^(2) + 4xy - 2y^(2) + 4x + 8y + k = 0 represents a pair of lines, Further find whether these lines are parallel or intersecting.

The value of k so that the equation 12x^(2)-10xy+2y^(2)+11x-5y+k=0 represents a pair of lines is -2 (b) 2(c)7 (d) -7

The value of k so that the equation 12x^(2)-10xy+2y^(2)+11x-5y+k=0 represents a pair of lines is a.-2 b.2 c.7d.-7

The value of k for which 2x^(2) + 5xy + 3y^(2) + 3x + 4y + k = 0 represent pair of straight lines is

The value of 'p' for which the equation x^2+pxy+y^2-5x-7y+6=0 represents a pair of straight lines , is

The value of k for which the equation 2x^2+5y^2-2kxy+4x+6y=0 represent the pair of straight lines is