做得好+++分1:x^2-7X+122:X^2+7X+103:(X+Y除4X+21)X+Y-------4X+214:(
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/05/01 10:46:30
做得好+++分
1:x^2-7X+12
2:X^2+7X+10
3:(X+Y除4X+21)
X+Y
-------
4X+21
4:(X^2-4除X^2+3X+2)
X^2-4
-------
X^2+3X+2
能说一下用什么方法做吗?3.是:(X+7除4X+28)
1:x^2-7X+12
2:X^2+7X+10
3:(X+Y除4X+21)
X+Y
-------
4X+21
4:(X^2-4除X^2+3X+2)
X^2-4
-------
X^2+3X+2
能说一下用什么方法做吗?3.是:(X+7除4X+28)
1:x^2-7X+12=(x-3)(x-4)
2:X^2+7X+10=(x+2)(x+5)
3:(X+Y)/(4X+21)
这题是不是错了啊?
4:(X^2-4)/(X^2+3X+2)=[(x+2)(x-2)]/[(x+1)(x+2)]
=(x-2)/(x+1)
2:X^2+7X+10=(x+2)(x+5)
3:(X+Y)/(4X+21)
这题是不是错了啊?
4:(X^2-4)/(X^2+3X+2)=[(x+2)(x-2)]/[(x+1)(x+2)]
=(x-2)/(x+1)
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|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|