1.x-z/xy - 2ab/xy 2.a²+b²/a-b - 2ab/a-b
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1.x-z/xy-2ab/xy2.a²+b²/a-b-2ab/a-b1.x-z/xy-2ab/xy2.a²+b²/a-b-2ab/a-b1.x-z/xy-2ab
1.x-z/xy - 2ab/xy 2.a²+b²/a-b - 2ab/a-b
1.x-z/xy - 2ab/xy
2.a²+b²/a-b - 2ab/a-b
1.x-z/xy - 2ab/xy 2.a²+b²/a-b - 2ab/a-b
1
=(x-z-2ab)/xy
2
=(a²-2ab+b²)/a-b
=(a-b)²/a-b
=a-b
1.x-z/xy - 2ab/xy 2.a²+b²/a-b - 2ab/a-b
初二数学分式的加减法1.x-z/xy - 2ab/xy 2.a²+b²/a-b - 2ab/a-b
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