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歡迎您訪問數(shù)學考題練習:計算:-3x2y3x2y2=________,!

數(shù)學考題練習:計算:-3x2y3x2y2=________,

更新時間:2024-01-12 16:30:45作者:貝語網(wǎng)校

計算:-3x2y3•x2y2=________,(x+1)(x-3)=________.

試題答案

-3x4y5    x2-2x-3

試題解析

分別利用單項式乘以單項式、多項式乘以多項式的運算法則進行計算即可.

解答:-3x2y3•x2y2=-3x2+2y3+2=-3x4y5

(x+1)(x-3)=x2-3x+x-3=x2-2x-3

故答案為:-3x4y5,x2-2x-3

點評:本題考查了整式的有關(guān)運算,單項式乘以單項式時,系數(shù)和系數(shù)相乘作為結(jié)果的系數(shù),相同字母和相同字母按同底數(shù)冪的乘法計算即可.

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