解決y=(x+3)^2-4 |Microsoft數學求解器

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解 y

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y=x^{2}+6x+9-4

使用二項式定理 \left(a+b\right)^{2}=a^{2}+2ab+b^{2} 展開 \left(x+3\right)^{2}。

y=x^{2}+6x+5

從 9 減去 4 會得到 5。

示例

二次方程式