题目内容
①x2•x3=______;(-2y2)3=______;
②3x4•4x3=______;(-y3)2=______;x5÷x3=______;
③(2x+1)(2x-1)=______;(a-2)2=______.
②3x4•4x3=______;(-y3)2=______;x5÷x3=______;
③(2x+1)(2x-1)=______;(a-2)2=______.
①x2•x3=x2+3=x5;
(-2y2)3=-8y6;
②3x4•4x3=12x7;
(-y3)2=y6;
x5÷x3=x2;
③(2x+1)(2x-1)=4x2-1;
(a-2)2=a2-4a+4.
(-2y2)3=-8y6;
②3x4•4x3=12x7;
(-y3)2=y6;
x5÷x3=x2;
③(2x+1)(2x-1)=4x2-1;
(a-2)2=a2-4a+4.
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