a) |6-x|=5 b) |5x-10|-10=0 c) 2|x-2|=jedna druga d) pierwiastek z x kwadrat-6x+9=2
a) |6-x|=5
6-x=5
-x=5-6
-x=-1
x=1
6-x=-5
-x=-5-6
-x=-11
x=11
b) |5x-10|-10=0
|5x-10|=10
5x-10=10
5x=20
x=4
5x-10=-10
5x=0
x=0
c) 2|x-2|=jedna druga
4|x-2|=1
|x-2|=1/4
x-2=1/4
x=1/4+2
x=2 1/4
x-2=-1/4
x=-1/4+2
x=1 3/4
d) pierwiastek z x kwadrat-6x+9=2
√(x²-6x+9)=2 //²
x²-6x+9=4
x²-6x+5=0
Δ=36-4*1*5=36-20=16
√Δ=4
x1=(6-4)/2=2/2=1
x2=(6+4)/2=10/2=5
licze na naj
a) (6-x)=5
x=5+6
x+11
b) (5x-10)-10=0
-5x=0+10
-5x=10
x=10:(-5)
x= -2
c) 2(x-2)=0,5
2x-4=0,5
2x=0,5-4
2x=-3,5
x=-3,5:2
x=.......
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a) |6-x|=5
6-x=5
-x=5-6
-x=-1
x=1
6-x=-5
-x=-5-6
-x=-11
x=11
b) |5x-10|-10=0
|5x-10|=10
5x-10=10
5x=20
x=4
5x-10=-10
5x=0
x=0
c) 2|x-2|=jedna druga
4|x-2|=1
|x-2|=1/4
x-2=1/4
x=1/4+2
x=2 1/4
x-2=-1/4
x=-1/4+2
x=1 3/4
d) pierwiastek z x kwadrat-6x+9=2
√(x²-6x+9)=2 //²
x²-6x+9=4
x²-6x+5=0
Δ=36-4*1*5=36-20=16
√Δ=4
x1=(6-4)/2=2/2=1
x2=(6+4)/2=10/2=5
licze na naj
a) (6-x)=5
x=5+6
x+11
b) (5x-10)-10=0
-5x=0+10
-5x=10
x=10:(-5)
x= -2
c) 2(x-2)=0,5
2x-4=0,5
2x=0,5-4
2x=-3,5
x=-3,5:2
x=.......