因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^20082008^2-2007*2008 (1)3.98^2-3.98*3.97 (2)3ab^2+6a^2+ab (3)a^3(x-y)-3a^2b(y-x) (4)3^2007+6*3^2006-3^2008 (5)
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![因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^20082008^2-2007*2008 (1)3.98^2-3.98*3.97 (2)3ab^2+6a^2+ab (3)a^3(x-y)-3a^2b(y-x) (4)3^2007+6*3^2006-3^2008 (5)](/uploads/image/z/3754994-50-4.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3+2008%5E2-2007%2A2008+3.98%5E2-3.98%2A3.97+3ab%5E2%2B6a%5E2%2Bab+a%5E3%28x-y%29-3a%5E2b%28y-x%29+3%5E2007%2B6%2A3%5E2006-3%5E20082008%5E2-2007%2A2008+%281%293.98%5E2-3.98%2A3.97+%282%293ab%5E2%2B6a%5E2%2Bab+%283%29a%5E3%28x-y%29-3a%5E2b%28y-x%29+%284%293%5E2007%2B6%2A3%5E2006-3%5E2008+%285%29)
因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^20082008^2-2007*2008 (1)3.98^2-3.98*3.97 (2)3ab^2+6a^2+ab (3)a^3(x-y)-3a^2b(y-x) (4)3^2007+6*3^2006-3^2008 (5)
因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^2008
2008^2-2007*2008 (1)
3.98^2-3.98*3.97 (2)
3ab^2+6a^2+ab (3)
a^3(x-y)-3a^2b(y-x) (4)
3^2007+6*3^2006-3^2008 (5)
因式分解 2008^2-2007*2008 3.98^2-3.98*3.97 3ab^2+6a^2+ab a^3(x-y)-3a^2b(y-x) 3^2007+6*3^2006-3^20082008^2-2007*2008 (1)3.98^2-3.98*3.97 (2)3ab^2+6a^2+ab (3)a^3(x-y)-3a^2b(y-x) (4)3^2007+6*3^2006-3^2008 (5)
2008^2-2007*2008 =2008×2008-2007×2008=2008×(2008-2007)=2008×1=2008
3.98^2-3.98*3.97=3.98×3.98-3.98×3.97=3.98×(3.98-3.97)=3.98×0.01=0.0398
3ab^2+6a^2+ab=ab(3b+6a+1)
a^3(x-y)-3a^2b(y-x)=a³(x-y)-3a²b[-(x-y)]=a³(x-y)+3a²b(x-y)
=(a³+3a²b)(x-y)=a²(a+3b)(x-y)
3^2007+6*3^2006-3^2008=3^2006*3+6*3^2006-3^2006*3*3=3^2006(3+6-3*3)=0