文档介绍：223254562.(-xy)+(222636356333222226666232n+2992x×y)(-y2m+、×y(-xy)的结果是()108C.-xy812123124xy)×(-xy)计算结果为()A.-316xy.-xyD.-xy123.(´10)´(-´10)计算结果是()´1013B.-6´1013´1013-(ab)3+2ab×(-3ab)2的结果为()A.-17ab3B.-18ab33()2mB.35x2mm+2m+m-1×xm+n×y=xy,则4m-3n=()(-3x)×(-3mnm)的结果是()4mymnB.-113xyC.-2x3m+2ym+nD.-113(x+y)5m+()A.(a)×(-a)=a12B.(-ab)×(-ab)=ab7C.(2xy)×(-3xy)2=18x2n+1yn+2D.(-xy)(-yz)(-zx)=-xyz3二、填空题:1.(ax)(ax)=.(__________)(xy)2=-xy33.(-3xy)×(-x)×(-y)=.-6ab×(abc)2=.(-3ab)×4(-ab)=××2xn-1×yn-1=×(-2mn)×(-mn)3=.(´10)(´10)(4´10)=、(1)4xy×(-38xyz)(2)(37ab)(-213abc)(3)5x×(13ax)×(-)×()(4)25xy×(-)2-(-2x)33(5)(-5xy)×3xy-12x×(-74y)(6)5ab×(-3b)2+(-6ab)2×(-ab)-ab×(-4a)22、已知:x=4,y=-18,求代数式xy×14(xy)72×14、已知:39m×27=3,=3,2=6,2=12,求证:2b=a+´10cm,宽为6´10cm,高为5´10cm,-3x+1)=x-2x+x(ab-22232222332222322223222223222222232232633233单项式与多项式相乘一、(2x-1)-x(2-x)的结果是( )A.-x-x-xC.-x-1-