把(x-y),(a+b)作为一个因式,合并同类项.(1)3(x-y)^2-9(x-y)-8(x-y)^2+6(x-y)-1 (2)2(a+b)-5/8(a+b)^2-2/3(a+b)+3(a+b)^2+2
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![把(x-y),(a+b)作为一个因式,合并同类项.(1)3(x-y)^2-9(x-y)-8(x-y)^2+6(x-y)-1 (2)2(a+b)-5/8(a+b)^2-2/3(a+b)+3(a+b)^2+2](/uploads/image/z/5246056-64-6.jpg?t=%E6%8A%8A%28x-y%29%2C%28a%2Bb%29%E4%BD%9C%E4%B8%BA%E4%B8%80%E4%B8%AA%E5%9B%A0%E5%BC%8F%2C%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9.%281%293%28x-y%29%5E2-9%28x-y%29-8%28x-y%29%5E2%2B6%28x-y%29-1+%282%292%28a%2Bb%29-5%2F8%28a%2Bb%29%5E2-2%2F3%28a%2Bb%29%2B3%28a%2Bb%29%5E2%2B2)
把(x-y),(a+b)作为一个因式,合并同类项.(1)3(x-y)^2-9(x-y)-8(x-y)^2+6(x-y)-1 (2)2(a+b)-5/8(a+b)^2-2/3(a+b)+3(a+b)^2+2
把(x-y),(a+b)作为一个因式,合并同类项.(1)3(x-y)^2-9(x-y)-8(x-y)^2+6(x-y)-1 (2)2(a+b)-5/8(a+b)^2-2/3(a+b)+3(a+b)^2+2
把(x-y),(a+b)作为一个因式,合并同类项.(1)3(x-y)^2-9(x-y)-8(x-y)^2+6(x-y)-1 (2)2(a+b)-5/8(a+b)^2-2/3(a+b)+3(a+b)^2+2
3(x-y)^2-9(x-y)-8(x-y)^2+6(x-y)-1
=-5(x-y)^2-3(x-y)-1
2(a+b)-5/8(a+b)^2-2/3(a+b)+3(a+b)^2+2
=19/8(a+b)^2-4/3(a+b)+3(a+b)^2+2