Question

Rpd va rog dau coroana si 10 p si 5 stele si inima daaca e corect​

Answer 1

a. |x|=5

1. x= -5

2. x=5

x∈{-5,5}

b. |x|=0

x=0

c. |x-2|=4

1. x-2= -4

x= -2

2. x-2=4

x=6

x∈{-2,6}

d. |x-6|=1

1. x-6= -1

x=5

2. x-6=1

x=7

x∈{5,7}

e. |2x|=8

1. 2x= -8

x= -4

2. 2x=8

x=4

x∈{-4,4}

f. |3x-1|=11

1. 3x-1= -11

3x= -10

x= -10/3∉Z

2. 3x-1=11

3x=12

x=4

x∈{4}

g. |1-2x|=7

1. 1-2x= -7

2x=8

x=4

2. 1-2x=7

2x= -6

x= -3

x∈{-3,4}

h. |3x-2|= -7

x∈∅