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歡迎您訪問數學考題練習:計算:(8x5-6x3-4x2)÷(-2x)=!

數學考題練習:計算:(8x5-6x3-4x2)÷(-2x)=

更新時間:2024-01-12 16:46:04作者:貝語網校

計算:(8x5-6x3-4x2)÷(-2x)=

A.-4x4-3x2+2x

B.-4x4+3x2+2x

C.4x4+3x2-2x

D.4x4-3x2-2x

試題答案

B

試題解析

多項式除以單項式,先把多項式的每一項都分別除以這個單項式,然后再把所得的商相加.根據這個法則即可求出結果.

解答:(8x5-6x3-4x2)÷(-2x),

=8x5÷(-2x)-6x3÷(-2x)-4x2÷(-2x),

=-4x4+3x2+2x.

故選B.

點評:本題主要考查多項式除以單項式,先把多項式的每一項都分別除以這個單項式,然后再把所得的商相加,熟練掌握運算法則是解題的關鍵,要注意各項符號的變化.

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