1、约分(1)-4x²y/8xy² (2)2(x-y)²/6(y-x)² (3)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/21 11:10:35
1、约分
(1)-4x²y/8xy² (2)2(x-y)²/6(y-x)² (3)a²-4a+4/a²-4 (4)x三次-2x²y/x²y-2xy²
2、用分式表示下列各式的商,并约分
(1)-4m三次n²/(2m三次nl) (2)(x²-9)/(-2x²+6x)
(1)-4x²y/8xy² (2)2(x-y)²/6(y-x)² (3)a²-4a+4/a²-4 (4)x三次-2x²y/x²y-2xy²
2、用分式表示下列各式的商,并约分
(1)-4m三次n²/(2m三次nl) (2)(x²-9)/(-2x²+6x)
1、约分
(1)-4x²y/8xy² =-x/2y
(2)2(x-y)²/6(y-x)² =1/3
(3)a²-4a+4/a²-4 =(a-2)²/(a-2)(a+2) = (a-2)/(a+2)
(4)x三次-2x²y/x²y-2xy² = x²(x-2y)/xy(x-2y)=x/y
2、用分式表示下列各式的商,并约分
(1)-4m三次n²/(2m三次nl)
=-2n
(2)(x²-9)/(-2x²+6x)
=(x-3)(x+3)/(-2x)(x-3)
=(x+3)/(-2x)
(1)-4x²y/8xy² =-x/2y
(2)2(x-y)²/6(y-x)² =1/3
(3)a²-4a+4/a²-4 =(a-2)²/(a-2)(a+2) = (a-2)/(a+2)
(4)x三次-2x²y/x²y-2xy² = x²(x-2y)/xy(x-2y)=x/y
2、用分式表示下列各式的商,并约分
(1)-4m三次n²/(2m三次nl)
=-2n
(2)(x²-9)/(-2x²+6x)
=(x-3)(x+3)/(-2x)(x-3)
=(x+3)/(-2x)
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