Question

решите уравнение
||х| -4 |=5

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Answer 1

||х|-4|=5

|х|-4=5

|х|-4=-5

х1=9 х2=-9

Answer 2

||х|-4|=5
|х|-4=5
|х|-4=-5
х=9
х=-9
x1=-9
x2=9