| (-x2)3=______;(-3xy2)2•(-2x2y)=______;[(x+y)2m+1]3•(x+y)5m+2=______. |
答案:
| (-x2)3=-x2×3=-x6;(-3xy2)2•(-2x2y), =9x2y4•(-2x2y), =-18x4y5;[(x+y)2m+1]3•(x+y)5m+2, =(x+y)6m+3•(x+y)5m+2, =(x+y)11m+5. 故答案为:-x6;-18x4y5;(x+y)11m+5. |

| (-x2)3=______;(-3xy2)2•(-2x2y)=______;[(x+y)2m+1]3•(x+y)5m+2=______. |
答案:
| (-x2)3=-x2×3=-x6;(-3xy2)2•(-2x2y), =9x2y4•(-2x2y), =-18x4y5;[(x+y)2m+1]3•(x+y)5m+2, =(x+y)6m+3•(x+y)5m+2, =(x+y)11m+5. 故答案为:-x6;-18x4y5;(x+y)11m+5. |