9(x-y)-3(-y-x)分解因式怎么分?
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9(x-y)-3(-y-x)分解因式9(x-y)-3(-y-x)=9(x-y)+3(x+y)=3(3x-3y+x+y)=3(4x-2y)=6(2x-y)
咨询记录 · 回答于2023-02-23
9(x-y)-3(-y-x)分解因式怎么分?
9(x-y)-3(-y-x)分解因式9(x-y)-3(-y-x)=9(x-y)+3(x+y)=3(3x-3y+x+y)=3(4x-2y)=6(2x-y)
这里两边不一样,左边是(x-y),右边是(-y-x),所以需要展开化简,不能直接分解