(1)∵△=[-(m-1)]2-4m=m2+2m+1-4m=(m-1)2,
又∵不论m取何实数,总有(m-1)2≥0,
∴△≥0,
∴不论m取何实数,方程都有实数根.
(2)∵由求根公式得x1,2=
(m+1)±(m-1)2 /2
=
(m+1)±(m-1)/2
∴x1=m,x2=1,
∴只要m取整数(不等于1),则方程的解就都为整数且不相等.
如取m=2,则原方程有两个不相等的整数根,分别是x1=2,x2=1
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