求解 (9-x)(y+4) | Microsoft Math Solver

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9y+36-xy-4x

应用分配律，将 9-x 的每一项和 y+4 的每一项分别相乘。

9y+36-xy-4x

应用分配律，将 9-x 的每一项和 y+4 的每一项分别相乘。

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