The question is, do you know what you are trying to find the discriminant OF?
Given that x and y satisfy the simultaneous equations
mx + (m-1)y = 10
(m-2)x + 3my = 20
(a) If the equations have no unique solution, find the values of m. [1/2, -2]
(b) If the equations have no solutions, find the values of m. [1/2]
(c) If m =3, solve the simulataneous equations [x=2, y =2]
Can this question be solved by NOT using the determinant method (i.e. b^2 - 4ac)
For part a), this implies b^2 - 4ac = 0 (right?)
For part b), this implies b^2 - 4ac = ?