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Given x = √ 3-1, then 2x & # 178; + 4x-3
2x²+4x-3=2（x-1)^2+1=3+1=4
-X ≥ 3-2x & # 178; solving set
2x²-x-3≥0
(x+1)(2x-3)≥0
X is less than or equal to - 1 or X ≥ 3 / 2
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