由题意得X^2-2MX+M^2-M=0
或X^2-(4M+1)X+4M^2+M=0
或4X^2-(12M+4)X+9M^2+8M+12=0
解得
(X-M)^2-M=0
或(X-2M-1/2)^2-M-1/4=0
或(X+3/2M+1/2)^2+M/3+1/4=0
所以M〉=0
或M>=1/4
或M
由题意得X^2-2MX+M^2-M=0
或X^2-(4M+1)X+4M^2+M=0
或4X^2-(12M+4)X+9M^2+8M+12=0
解得
(X-M)^2-M=0
或(X-2M-1/2)^2-M-1/4=0
或(X+3/2M+1/2)^2+M/3+1/4=0
所以M〉=0
或M>=1/4
或M