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8 questions
次の2次不等式を解け.
5−172≤x≤5+172\frac{5-\sqrt{17}}{2}\le x\le\frac{5+\sqrt{17}}{2}25−17≤x≤25+17
なし
x≤5−172x\le\frac{5-\sqrt{17}}{2}x≤25−17 , 5+172≤x\frac{5+\sqrt{17}}{2}\le x25+17≤x
すべての実数
4−193<x<4+193\frac{4-\sqrt{19}}{3}<x<\frac{4+\sqrt{19}}{3}34−19<x<34+19
x<4−193x<\frac{4-\sqrt{19}}{3}x<34−19 , 4+193<x\frac{4+\sqrt{19}}{3}<x34+19<x
全ての実数
x≠−2x\ne-2x=−2
x=−2x=-2x=−2
x≠4x\ne4x=4
x=4x=4x=4
−3−172<x<−3+172\frac{-3-\sqrt{17}}{2}<x<\frac{-3+\sqrt{17}}{2}2−3−17<x<2−3+17
x<−3−172x<\frac{-3-\sqrt{17}}{2}x<2−3−17 , −3+172<x\frac{-3+\sqrt{17}}{2}<x2−3+17<x
−2−102≤x≤−2+102\frac{-2-\sqrt{10}}{2}\le x\le\frac{-2+\sqrt{10}}{2}2−2−10≤x≤2−2+10
x≤−2−102x\le\frac{-2-\sqrt{10}}{2}x≤2−2−10 , −2+102≤x\frac{-2+\sqrt{10}}{2}\le x2−2+10≤x
x≠−3x\ne-3x=−3
x=−3x=-3x=−3
x≠2x\ne2x=2
x=2x=2x=2
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