题目内容
①(x4)2=______;
②-(y4)3=______;
③(am)4=______;
④(-y4)2=______.
②-(y4)3=______;
③(am)4=______;
④(-y4)2=______.
①(x4)2=x8;
②-(y4)3=-y12;
③(am)4=a4m;
④(-y4)2=y8.
故答案为:x8,-y12,a4m,y8.
②-(y4)3=-y12;
③(am)4=a4m;
④(-y4)2=y8.
故答案为:x8,-y12,a4m,y8.
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