✨ Best Answer ✨
α^2 + β^2 = (α + β )^2 - 2αβ ・・・①
解と係数の関係から
α + β = -3 αβ = 5
よって①は
(-3)^2 -2×5 = 9-10 = -1
✨ Best Answer ✨
α^2 + β^2 = (α + β )^2 - 2αβ ・・・①
解と係数の関係から
α + β = -3 αβ = 5
よって①は
(-3)^2 -2×5 = 9-10 = -1
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