1.已知m-n=-2,则-m+n=多少?4-2m+2n=多少?2.已知a-b=5,a·b=1,求以下代数式的值.(2a+3b-2ab)-(a+4b1.已知m-n=-2,则-m+n=多少?4-2m+2n=多少?2.已知a-b=5,a·b=1,求以下代数式的值.(2a+3b-2ab)-(a+4b+ab)-(3ab+2b-2a)
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![1.已知m-n=-2,则-m+n=多少?4-2m+2n=多少?2.已知a-b=5,a·b=1,求以下代数式的值.(2a+3b-2ab)-(a+4b1.已知m-n=-2,则-m+n=多少?4-2m+2n=多少?2.已知a-b=5,a·b=1,求以下代数式的值.(2a+3b-2ab)-(a+4b+ab)-(3ab+2b-2a)](/uploads/image/z/7218319-31-9.jpg?t=1.%E5%B7%B2%E7%9F%A5m-n%3D-2%2C%E5%88%99-m%2Bn%3D%E5%A4%9A%E5%B0%91%3F4-2m%2B2n%3D%E5%A4%9A%E5%B0%91%3F2.%E5%B7%B2%E7%9F%A5a-b%3D5%2Ca%C2%B7b%3D1%2C%E6%B1%82%E4%BB%A5%E4%B8%8B%E4%BB%A3%E6%95%B0%E5%BC%8F%E7%9A%84%E5%80%BC.%EF%BC%882a%2B3b-2ab%29-%28a%2B4b1.%E5%B7%B2%E7%9F%A5m-n%3D-2%2C%E5%88%99-m%2Bn%3D%E5%A4%9A%E5%B0%91%3F4-2m%2B2n%3D%E5%A4%9A%E5%B0%91%3F2.%E5%B7%B2%E7%9F%A5a-b%3D5%2Ca%C2%B7b%3D1%2C%E6%B1%82%E4%BB%A5%E4%B8%8B%E4%BB%A3%E6%95%B0%E5%BC%8F%E7%9A%84%E5%80%BC.%EF%BC%882a%2B3b-2ab%29-%28a%2B4b%2Bab%29-%283ab%2B2b-2a%29)
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