3X^2+X-2＞=0 ······（1）
4X^2-15X+9＞0·······（2）
由（1）得(3x-2)(x+1)≥0,即有x≥2/3或x≤-1
由（2）得(4x-3)(x-3)＞0,即有x＞3或x＜3/4
综合以上,我们有x＞或x≤-1
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