Mathematics
Junior High
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a³+b³が(a+b)³~になるのが理解できません。
なぜそうなるのですか?

2 5 2 (5) 解と係数の関係より a+b=2、ab=-1 a³ + b³ = (a + b)³ - 3a²b =(a+b)3-3ab (a + h) 3ab²

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✨ Best Answer ✨

そうしないと式の値が求められないから。

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