(1)a15÷a5=______;(2)(x+3y)(x-3y)=______;(3)(4m4n3-6m3n2+2mn)÷2mn=______.

发布时间:2020-08-05 19:42:51

(1)a15÷a5=______;
(2)(x+3y)(x-3y)=______;
(3)(4m4n3-6m3n2+2mn)÷2mn=______.

网友回答

解:(1)原式=a15-5
=a10;
(2)原式=x2-(3y)2
=x2-9y2;
(3)原式=4m4n3÷2mn-6m3n2÷2mn+2mn÷2mn
=2m3n2-3m2n+1;
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