X-2-(x²/ x+2)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/15 17:25:43
X-2-(x²/x+2)X-2-(x²/x+2)X-2-(x²/x+2)原式=[(x-2)(x+2)/(x+2)-x²/(x+2)=(x²-4)/(x

X-2-(x²/ x+2)
X-2-(x²/ x+2)

X-2-(x²/ x+2)
原式=[(x-2)(x+2)/(x+2)-x²/(x+2)
=(x²-4)/(x+2)-x²/(x+2)
=(x²-4-x²)/(x+2)
=-4/(x+2)

原式得x-2-(x+2) 去括号得x-2-x-2 得解=-4

有两个答案.
一个当X是正数时.X-2-(x²/ x+2)
=X-2-(X+2)
=-4
一个当X是负数时:X-2-(x²/ x+2)
=X-2-(-X+2)
=2X-4

原式=[(x-2)(x+2)/(x+2)-x²/(x+2)
=(x²-4)/(x+2)-x²/(x+2)
=(x²-4-x²)/(x+2)
=-4/(x+2)