Please solve the equation x^2+2x=a^2+2a
P.S The answer is a or -a-2, please explain also.
Thank you!!
F.4 Maths...(1 question only!!)
2007-11-02 3:25 am
回答 (1)
2007-11-02 3:33 am
✔ 最佳答案
x^2+2x=a^2+2ax^2-a^2+2x-2a=0
(x+a)(x-a)+2(x-a)=0
(x-a)(x+a+2)=0
x-a=0 or x+a+2=0
x=a or x=-a-2
收錄日期: 2021-04-24 09:45:43
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