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歡迎您訪問數(shù)學(xué)考題練習(xí):-9x2+7x2-3x2+6x2-x2合并同類!

數(shù)學(xué)考題練習(xí):-9x2+7x2-3x2+6x2-x2合并同類

更新時間:2024-01-12 16:33:42作者:貝語網(wǎng)校

-9x2+7x2-3x2+6x2-x2合并同類項的結(jié)果是

A.x2

B.1

C.0

D.-1

試題答案

C

試題解析

這個式子的運算是合并同類項的問題,根據(jù)合并同類項的法則,即系數(shù)相加作為系數(shù),字母和字母的指數(shù)不變.

解答:-9x2+7x2-3x2+6x2-x2=(-9+7-3+6-1)x2=0,故選C.

點評:本題主要考查合并同類項得法則.即系數(shù)相加作為系數(shù),字母和字母的指數(shù)不變.

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