因式分解的简单应用 (21 18:50:51)
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因式分解的简单应用 (21 18:50:51)
1. (x2+2xy+y2)/(x+y)
2. [(a-b)2+2(b-a)]/(a-b)
3. (ab2+a2b)/(a+b)
4. (x2-49)/7-x)
5. (4mn3+6m3n)/(2n2+3m2)
6. [(2a-1)2-(3a-1)2]/(5a-2)
1. (x2+2xy+y2)/(x+y)
2. [(a-b)2+2(b-a)]/(a-b)
3. (ab2+a2b)/(a+b)
4. (x2-49)/7-x)
5. (4mn3+6m3n)/(2n2+3m2)
6. [(2a-1)2-(3a-1)2]/(5a-2)
![因式分解的简单应用 (21 18:50:51)](/uploads/image/z/18365663-47-3.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E7%9A%84%E7%AE%80%E5%8D%95%E5%BA%94%E7%94%A8+%2821+18%3A50%3A51%29)
1.(x2+2xy+y2)/(x+y) =(x+y)^2/(x+y)=x+y
2.[(a-b)2+2(b-a)]/(a-b) = (a-b)-2
3.(ab2+a2b)/(a+b)=ab(b+a)/(a+b)=ab
4.(x2-49)/(7-x) =(x-7)(x+7)/(7-x)=-(x+7)
5.(4mn3+6m3n)/(2n2+3m2)=2mn(2n^2+3m^2)/(2n^2+3m^2)=2mn
6.[(2a-1)2-(3a-1)2]/(5a-2)=[(2a-1+3a-1)(2a-1-3a+1)]/(5a-2)=-a
2.[(a-b)2+2(b-a)]/(a-b) = (a-b)-2
3.(ab2+a2b)/(a+b)=ab(b+a)/(a+b)=ab
4.(x2-49)/(7-x) =(x-7)(x+7)/(7-x)=-(x+7)
5.(4mn3+6m3n)/(2n2+3m2)=2mn(2n^2+3m^2)/(2n^2+3m^2)=2mn
6.[(2a-1)2-(3a-1)2]/(5a-2)=[(2a-1+3a-1)(2a-1-3a+1)]/(5a-2)=-a