一个多项式ab-2bc+3ac的和为ab-2bc+2ab求原多项式与ab-2bc+3ac的差.
问题描述:
一个多项式ab-2bc+3ac的和为ab-2bc+2ab求原多项式与ab-2bc+3ac的差.
答
多项式=(ab-2bc+2ab)-(ab-2bc+3ac)
=2ab-3ac
差=(2ab-3ac)-(ab-2bc+3ac)
=ab+2ab+2bc-6ac