一：整式的混合运算
二：整式的混合运算计算题2道带答案
3ab-4ab+8ab-7ab+ab=______． 4．7x-(5x-5y)-y=______．
三：初中数学计算题:二次整式混合运算10道
5ax+5bx+3ay+3by 解法：=5x(a+b)+3y(a+b) =(5x+3y)(a+b) 2. x3-x2+x-1 解法：=(x3-x2)+(x-1) =x2(x-1)+(x-1) =(x-1)(x2+1) 3. x2-x-y2-y 解法：=(x2-y2)-(x+y) =(x+y)(x-y)-(x+y) =(x+y)(x-y+1) 4、758²—258² =(758+258)(758-258)=1016*500=508000
5、3ab^2-9a^2b^2+6a^3b^2 =3ab^2(1-3a+2a^2) =3ab^2(2a^2-3a+1) =3ab^2(2a-1)(a-1) 6、x^2+3x-40 =x^2+3x+2.25-42.25 =(x+1.5)^2-(6.5)^2 =(x+8)(x-5)．
7、3ab^2-9a^2b^2+6a^3b^2 =3ab^2(1-3a+2a^2) =3ab^2(2a^2-3a+1) =3ab^2(2a-1)(a-1) 8、5-7(a+1)-6(a+1)^2 =-[6(a+1)^2+7(a+1)-5] =-[2(a+1)-1][3(a+1)+5] =-(2a+1)(3a+8); 9、-4x^3 +6x^2 -2x =-2x(2x^2-3x+1) =-2x(x-1)(2x-1); 10、6(y-z)^2 +13(z-y)+6 =6(z-y)^2+13(z-y)+6 =[2(z-y)+3][3(z-y)+2] =(2z-2y+3)(3z-3y+2).
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