计算:(1)a3?a2=________,(2)(-3x2y)2=________,(3)2m2n?(-5m4)=________,(4)(x+1)(x-6)=___

发布时间:2020-07-30 14:12:57

计算:(1)a3?a2=________,
(2)(-3x2y)2=________,
(3)2m2n?(-5m4)=________,
(4)(x+1)(x-6)=________,
(5)(6a2-10ab+2a)÷2a=________,
(6)(x+2y)2=________.

网友回答

解:(1)a3?a2=a3+2=a5;

(2)(-3x2y)2=(-3)2x4y2=9x4y2;

(3)?2m2n?(-5m4)=-10m2+4n=-10m6n;

(4)(x+1)(x-6)=x2-6x+x-6=x2-5x-6;

(5)(6a2-10ab+2a)÷2a=6a2÷2a-10ab÷2a+2a÷2a=3a-5b+1;

(6)(x+2y)2=x2+2x?2y+4y2=x2+4xy+4y2.

解析分析:(1)根据同底数幂相乘,底数不变,幂相加即可得出
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