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(1)解方程:x2﹣4x﹣1=0; (2)解不等式组:.
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根据下列要求解答相关问题.1请补全以下求不等式﹣2x2﹣4x>0的解集的过程.①构造函数画出图象根据
阅读下列例题解方程x2﹣|x|﹣2=0解1当x≥0时原方程化为x2﹣x﹣2=0解得x1=2x2=﹣1
下列说法正确的是
方程4+x=8和不等式4+x>8的解是一样的
x=2是不等式4x>5的唯一解
x=2是不等式4x>15的一个解
不等式x-2<6的两边都加上1,则此不等式成立
解方程x2+4x﹣1=0.
解方程x2+4x﹣1=0.
阅读例题请参照例题的方法解方程x2﹣|x﹣1|﹣1=0解方程x2﹣|x|﹣2=0解1当x≥0时得x2
阅读下面的例题解方程x﹣12﹣5|x﹣1|﹣6=0例解方程x2﹣|x|﹣2=0解令y=|x|原方程化
阅读题例解答下题例解方程x2﹣|x﹣1|﹣1=0解1当x﹣1≥0即x≥1时x2﹣x﹣1﹣1=0x2﹣
阅读下面的解题过程解方程|x+3|=2.解当x+3≥0时原方程可化成为x+3=2解得x=-1经检验x
解方程1x2+4x﹣1=0.
用配方法解方程2x2-4x+1=0的根是
用配方法解方程x2+4x﹣1=0
根据下列要求解答相关问题.1请补全以下求不等式﹣2x2﹣4x>0的解集的过程.①构造函数画出图象根据
解方程x2﹣4x﹣1=0
解方程x2﹣4x﹣1=0.
阅读下面的例题范例解方程x2﹣|x|﹣2=0解1当x≥0时原方程化为x2﹣x﹣2=0解得x1=2x2
下列判断正确的是
是一元一次方程
解方程﹣x﹣x=2,得x=1
方程
的解是x=0
从9+x=4x﹣2得x+4x=9﹣2
.阅读下面的例题解方程x﹣12﹣5|x﹣1|﹣6=0解方程x2﹣|x|﹣2=0解原方程化为|x|2﹣
若关于x的不等式x2-2ax-8a20的解集为x1x2且x2-x1=15则a=.
解方程x2+4x−2=0
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