x^2y-7xy+6y (因式分解)
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x^2y-7xy+6y(因式分解)x^2y-7xy+6y(因式分解)x^2y-7xy+6y(因式分解)=x^2y-xy-6xy+6y=xy(x-1)-6y(x-1)=y(x-1)(x-6)原式=y(x
x^2y-7xy+6y (因式分解)
x^2y-7xy+6y (因式分解)
x^2y-7xy+6y (因式分解)
=x^2y-xy-6xy+6y
=xy(x-1)-6y(x-1)
=y(x-1)(x-6)
原式=y(x-6)(x-1)
x^2y-7xy+6y
=y(x^2-7x+6)
=y(x-6)(x-1)
x^2y-7xy+6y = (x^2-7x+6)y= (x-1)(x-6)y
先提取y
这样,原式=y(x^2-7x+6)
现在来处理括号中的x^2-7x+6
先拆项
x^2-7x+6y=x^2-6x-x+6=x^2-6x-(x-6)=x(x-6)-(x-6)
提取(x-6)
可知x^2-7x+6=x(x-6)-(x-6)=(x-6)(x-1)代入最上面的式子可知原式=y(x-6)(x-1)
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