把a-b看作一个整体,合并同类项:第一个式子:(a-b)²-6+2(a-b)²-1第二个:2(a-b)²-3(a-b)+4(a-b)²+15(a-b)
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![把a-b看作一个整体,合并同类项:第一个式子:(a-b)²-6+2(a-b)²-1第二个:2(a-b)²-3(a-b)+4(a-b)²+15(a-b)](/uploads/image/z/14768112-48-2.jpg?t=%E6%8A%8Aa-b%E7%9C%8B%E4%BD%9C%E4%B8%80%E4%B8%AA%E6%95%B4%E4%BD%93%2C%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%EF%BC%9A%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%BC%8F%E5%AD%90%EF%BC%9A%EF%BC%88a-b%EF%BC%89%26%23178%3B-6%2B2%EF%BC%88a-b%EF%BC%89%26%23178%3B-1%E7%AC%AC%E4%BA%8C%E4%B8%AA%EF%BC%9A2%EF%BC%88a-b%EF%BC%89%26%23178%3B-3%EF%BC%88a-b%EF%BC%89%2B4%EF%BC%88a-b%EF%BC%89%26%23178%3B%2B15%EF%BC%88a-b%EF%BC%89)
把a-b看作一个整体,合并同类项:第一个式子:(a-b)²-6+2(a-b)²-1第二个:2(a-b)²-3(a-b)+4(a-b)²+15(a-b)
把a-b看作一个整体,合并同类项:
第一个式子:(a-b)²-6+2(a-b)²-1
第二个:2(a-b)²-3(a-b)+4(a-b)²+15(a-b)
把a-b看作一个整体,合并同类项:第一个式子:(a-b)²-6+2(a-b)²-1第二个:2(a-b)²-3(a-b)+4(a-b)²+15(a-b)
(a-b)²-6+2(a-b)²-1
=(a-b)²×(1+2)-(6+1)
=3(a-b)²-7
2(a-b)²-3(a-b)+4(a-b)²+15(a-b)
=(a-b)²×(2+4)+(a-b)×(-3+15)
=6(a-b)²+12(a-b)
(a-b)²-6+2(a-b)²-1
=3(a-b)²-7
2(a-b)²-3(a-b)+4(a-b)²+15(a-b)
=6(a-b)²+12(a-b)请详细解答(a-b)²-6+2(a-b)²-1 =(a-b)²*(1+2)-(6+1) =3(a-b)²-7 2...
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(a-b)²-6+2(a-b)²-1
=3(a-b)²-7
2(a-b)²-3(a-b)+4(a-b)²+15(a-b)
=6(a-b)²+12(a-b)
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