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歡迎您訪問數學考題練習:方程:x(x+1)=3(x+1)的解的情況是!

數學考題練習:方程:x(x+1)=3(x+1)的解的情況是

更新時間:2024-01-12 16:44:02作者:貝語網校

方程:x(x+1)=3(x+1)的解的情況是

A.x=-1

B.x=3

C.x1=-1,x2=3

D.以上答案都不對

試題答案

C

試題解析

解此題采用因式分解法最簡單,此題中的公因式為(x+1),提取公因式即可求得.

解答:∵x(x+1)=3(x+1)

∴x(x+1)-3(x+1)=0

∴(x+1)(x-3)=0

∴x1=-1,x2=3

故選C.

點評:此題提高了學生的計算能力,解題時要注意解題方法的選擇,特別要注意雖然因式分解法不適用于所有一元二次方程,但是只要可以用,它就是最簡單的方法.

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