【数学分式计算,要过程】x分之0-3ab×9a²b分之2x²x分之0-3ab×9a²b分之2x²-3ab÷3a分之2b²(xy-x²)÷xy分之x-yx+y分之x²-y²÷2x+2y分之x²+xym+1分之4m²-4m+1÷m²-1分之4m
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【数学分式计算,要过程】x分之0-3ab×9a²b分之2x²x分之0-3ab×9a²b分之2x²-3ab÷3a分之2b²(xy-x²)÷xy分之x-yx+y分之x²-y²÷2x+2y分之x²+xym+1分之4m²-4m+1÷m²-1分之4m
【数学分式计算,要过程】x分之0-3ab×9a²b分之2x²
x分之0-3ab×9a²b分之2x²
-3ab÷3a分之2b²
(xy-x²)÷xy分之x-y
x+y分之x²-y²÷2x+2y分之x²+xy
m+1分之4m²-4m+1÷m²-1分之4m²-1
(4x²-y²)÷2x-y分之4x²-4xy+y²
第一题打错了..
是x分之-3ab×9a²b分之2x²
【数学分式计算,要过程】x分之0-3ab×9a²b分之2x²x分之0-3ab×9a²b分之2x²-3ab÷3a分之2b²(xy-x²)÷xy分之x-yx+y分之x²-y²÷2x+2y分之x²+xym+1分之4m²-4m+1÷m²-1分之4m
x分之0-3ab×9a²b分之2x²
=-2x/3a
-3ab÷3a分之2b²
=-9a²/b
(xy-x²)÷xy分之x-y
=-x(x-y)×xy/(x-y)
=-x²y
x+y分之x²-y²÷2x+2y分之x²+xy
=(x-y)(x+y)/(x+y)×2(x+y)/x(x+y)
=2(x-y)/x
m+1分之4m²-4m+1÷m²-1分之4m²-1
=(2m-1)²/(m+1)×(m+1)(m-1)/(2m+1)(2m-1)
=(2m-1)(m-1)/(2m+1)
(4x²-y²)÷2x-y分之4x²-4xy+y²
=(2x+y)(2x-y)×(2x-y)/(2x-y)²
=2x+y
x分之0-3ab×9a²b分之2x²表示这里看不懂···
写错了没?