x²-2mx+m²-4≤0 怎么解
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x²-2mx+m²-4≤0 怎么解
x²-2mx+m²-4≤0 怎么解
x²-2mx+m²-4≤0 怎么解
x²-2mx+m²-4≤0
(x-m)^2≤4
-2≤x-m≤2
m-2≤x≤m=2
(x-m)²-4≤0
(x-m+2)(x-m-2)≤0
所以m-2≤x≤m+2
x²-2mx+m²-4≤0
(x-m)²≤4
∴m-2≤x≤2+m