求解 4(2--1) | Microsoft Math Solver

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求值

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因式分解

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测验

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4\left(2+1\right)

-1 的相反数是 1。

4\times 3

2 与 1 相加，得到 3。

12

将 4 与 3 相乘，得到 12。

示例

二次方程式