Let λ be a real number for which the system of linear equationsx + y + z = 64x + λy - λz = λ - 23x + 2y - 4z = - 5has infinitely many solutions. Then λ is a root of the quadratic equation:

Let λ be a real number for which the system of linear equationsx + y

1.	Let λ be a real number for which the system of linear equationsx + y + z = 64x + λy - λz = λ - 23x + 2y - 4z = - 5has infinitely many solutions. Then λ is a root of the quadratic equation:
A.	λ2 + 3λ - 4 = 0
B.	λ2 - 3λ - 4 = 0
C.	λ2 + λ - 6 = 0
D.	λ2 - λ - 6 = 0
Answer» E.