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2x²-9≧0の
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✨ Best Answer ✨

2x² - 9 ≧ 0

x² - 9/2 ≧ 0

(x + 3/√2) (x - 3/√2) ≧ 0

x ≦ -3/√2、 x ≧ 3/√2

ゆうと

助かりました!

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