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分解因式x^2-2xy-4x+8y
题目详情
分解因式x^2-2xy-4x+8y
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答案和解析
x^2-2xy-4x+8y
=x(x-4)-2y(x-4)
=(x-2y)(x-4)
=x(x-4)-2y(x-4)
=(x-2y)(x-4)
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