x^2+2x-3≥0,怎么算呐?
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x^2+2x-3≥0,怎么算呐?x^2+2x-3≥0,怎么算呐?x^2+2x-3≥0,怎么算呐?(x+3)(x-1)>=0则：x>=1或者x
x^2+2x-3≥0,怎么算呐?
x^2+2x-3≥0,怎么算呐?
x^2+2x-3≥0,怎么算呐?
(x+3)(x-1)>=0
则：
x>=1 或者 x
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