m/(x²-4) - 1/(x+2) = 0m/(x²-4) - (x-2) /(x²-4) = 0(m-x+2) /(x²-4) = 0{x-(m+2)} / {(x+2)(x-2)} = 0∵方程无解∴m+2=-2，或m+2=2∴m=-4，或m=0
