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Anonymous Anonymous
  • 09-09-2014
  • Mathematics
Answered

please help me                          llxl+2l=2

Verified Answer :

naǫ
naǫ naǫ
  • 09-09-2014

\(||x|+2|=2\)

if x≥0 then |x|=x
if x<0 then |x|=-x

1) for x≥0

\(|x+2|=2 \\ x+2=2 \ \lor \ x+2=-2 \\ x=0 \in D \ \lor \ x=-4 otin D\)


2) for x<0

\(|-x+2|=2 \\ -x+2=2 \ \lor \ -x+2=-2 \\ -x=0 \ \lor \ -x=-4 \\ x=0 otin D \ \lor \ x=4 otin D\)

The answer is:
\(x=0\)

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Anonymous Anonymous
  • 09-09-2014

There is only one solution to the problem and that is x=0.

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