Rownania i nierownosci z wartoscia bezwzgledna:
a)I 2x -5I =7
b)I2x-8I =0
c)I5+2xI<3
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a)I 2x -5I =7
2x-5=7 lub 2x-5=-7
2x=12 lub 2x=-2
x=6 lub x=-1
b)I2x-8I =0
2x-8=0
2x=8
x=4
c)I5+2xI<3
-3<5+2x<3 /-5
-8<x<-2 /:2
-4<x<-1
a)
I2x -5I =7
2x-5=7
2x=12
x=6
2x-5=-7
2x=-2
x=-1
b)
I2x-8I =0
2x-8=0
2x=8
x=4
c)
I5+2xI<3
5+2x<3
2x<-2
x<-1
5+2x>-3
2x>-8
x>-4
x∈(-4,-1)