1.4x²-12x+9＞0
(2x-3)²>0
2x-3≠0
x≠3/2
x∈(-∞,3/2)∪(3/2,+∞)
2.2x²+4x+9＞0
2x²+4x+2+7>0
2(x+1)²+7>0
x∈R
3.x²-x＞x(2x-3)+2
x²-2x+2
解一元二次不等式 用区间表示
解一元二次不等式 用区间表示
1.4x²-12x+9＞0
2.2x²+4x+9＞0
3.x²-x＞x(2x-3)+2
4.x²-x≥0
1.4x²-12x+9＞0
2.2x²+4x+9＞0
3.x²-x＞x(2x-3)+2
4.x²-x≥0
数学人气：382 ℃时间：2020-05-01 05:59:39
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