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Students and professionals solving everyday math problems quickly.
步骤 1:判别式
b² − 4ac = (-3)² − 4(1)(2) = 1
步骤 2:根的类型
Δ > 0 → 两个不相等的实根
步骤 3:求根公式
x = (−b ± √Δ) / 2a
x = (−(-3) ± √1) / 2(1)
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