2x^2-5xy=2y^2-5x-5y-25 因式分解
2个回答
2x2-5xy+2y2-5x-5y-25
=(2x-y)(x-2y)+ 5(2x-y)-5(x-2y)-25
=(2x-y)(x-2y+5)-5(x-2y+5)
=(x-2y+5)(2x-y-5)
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