题目内容
(-x2)3=______;(-3xy2)2•(-2x2y)=______;[(x+y)2m+1]3•(x+y)5m+2=______.
(-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.
(-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.
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