2x-3/x+3-2x/5怎么做

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2x-3/x+3-2x/5怎么做2x-3/x+3-2x/5怎么做2x-3/x+3-2x/5怎么做(2x-3)/(x+3)-2x/5=[5(2x-3)-2x(x+3)]/5(x+3)=(10x-15-2

2x-3/x+3-2x/5怎么做
2x-3/x+3-2x/5怎么做

2x-3/x+3-2x/5怎么做
(2x-3)/(x+3)-2x/5
=[5(2x-3)-2x(x+3)]/5(x+3)
=(10x-15-2x²-6x)/5(x+3)
=(-2x²+4x-15)/5(x+3)