3.54ⅹ3.54+2.46ⅹ2.46+4.46ⅹ4.46ⅹ3.54
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咨询记录 · 回答于2022-10-28
3.54ⅹ3.54+2.46ⅹ2.46+4.46ⅹ4.46ⅹ3.54
3.54ⅹ3.54+2.46ⅹ2.46+4.46ⅹ4.46ⅹ3.54=3.54ⅹ3.54+2.46ⅹ2.46+4.46ⅹ4.46ⅹ3.54+2×2.46×3.54-2×2.46×3.54=(3.54+2.46)的平方+4.46ⅹ4.46ⅹ3.54-2×2.46×3.54=36+3.54× (4.46×4.46-2×2.46)=36+3.54×14.9716=88.999464