指出下列运算错误之处并加以改正a(a²-ab+b²)-b(a²+ab+b²)=a³-a²b+ab²-ba²+ab²+b³=a³-2a²b+2ab²+b³负2xy(x²-3x+1)=(负2xy)x²+(负2xy)(负3x)=2x³y+6x²y
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![指出下列运算错误之处并加以改正a(a²-ab+b²)-b(a²+ab+b²)=a³-a²b+ab²-ba²+ab²+b³=a³-2a²b+2ab²+b³负2xy(x²-3x+1)=(负2xy)x²+(负2xy)(负3x)=2x³y+6x²y](/uploads/image/z/14051135-47-5.jpg?t=%E6%8C%87%E5%87%BA%E4%B8%8B%E5%88%97%E8%BF%90%E7%AE%97%E9%94%99%E8%AF%AF%E4%B9%8B%E5%A4%84%E5%B9%B6%E5%8A%A0%E4%BB%A5%E6%94%B9%E6%AD%A3a%28a%26%23178%3B-ab%2Bb%26%23178%3B%29-b%28a%26%23178%3B%2Bab%2Bb%26%23178%3B%29%3Da%26%23179%3B-a%26%23178%3Bb%2Bab%26%23178%3B-ba%26%23178%3B%2Bab%26%23178%3B%2Bb%26%23179%3B%3Da%26%23179%3B-2a%26%23178%3Bb%2B2ab%26%23178%3B%2Bb%26%23179%3B%E8%B4%9F2xy%28x%26%23178%3B-3x%2B1%29%3D%28%E8%B4%9F2xy%29x%26%23178%3B%2B%28%E8%B4%9F2xy%29%28%E8%B4%9F3x%29%3D2x%26%23179%3By%2B6x%26%23178%3By)
指出下列运算错误之处并加以改正a(a²-ab+b²)-b(a²+ab+b²)=a³-a²b+ab²-ba²+ab²+b³=a³-2a²b+2ab²+b³负2xy(x²-3x+1)=(负2xy)x²+(负2xy)(负3x)=2x³y+6x²y
指出下列运算错误之处并加以改正
a(a²-ab+b²)-b(a²+ab+b²)
=a³-a²b+ab²-ba²+ab²+b³
=a³-2a²b+2ab²+b³
负2xy(x²-3x+1)
=(负2xy)x²+(负2xy)(负3x)
=2x³y+6x²y
指出下列运算错误之处并加以改正a(a²-ab+b²)-b(a²+ab+b²)=a³-a²b+ab²-ba²+ab²+b³=a³-2a²b+2ab²+b³负2xy(x²-3x+1)=(负2xy)x²+(负2xy)(负3x)=2x³y+6x²y