Question

rezolvati mi si mie macar cateva , va rog !!!

Answer 1

|a|=8
a=8
a=-8
a apartine{-8,8}
|x|=-8
x nu apartine lui R
|-y|=2
-y=2
-y=-2
y=-2
-y=-2
y=-2
y=2
y apartine {-2,2}
|a+3|=1
a+3=1
a+3=-1
a=1-3
a+3=-1
a=-2
a+3=-1
a=-2
a=-1-3
a=-2
a=-4
a apartine {-4,2}
|x-4|=5
x-4=5
x-4=-5
x=5+4
x-4=-5
x=9
x-4=-5
x=9
x=-5+4
x=9
x=-1
x apartine {-1,9}
|3-6y|=12
3-6y=12
3-6y=-12
-6y=12-3
3-6y=-12
-6y=9
3-6y=-12
y=9:-6
3-6y=-12
y=9/-6
3-6y=-12
y=- 3/2
-6y=-12-3
y=- 3/2
-6y=-15
y=- 3/2
y=-15:-6
y=- 3/2
y=-15/-6
y-3/2
y=15/6
y=- 3/2
y=5/2
y apartine {- 3/2,5/2}