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What is the sum of all the real roots of the equation: |x−2|^2+|x−2|−2=0

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What is the sum of all the real roots of the equation: |x−2|^2+|x−2|−2=0
posted Nov 6, 2017 by anonymous

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1 Answer

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Answer: 3+1 = 4.
Given eqn.:
|x−2|2+|x−2|−2=0|x−2|2+|x−2|−2=0
Let , |x−2|=y|x−2|=y
⇒ y2+y−2=0⇒y2+y−2=0
⇒y=−2or1⇒y=−2or1
⇒|x−2|=−2,or1⇒|x−2|=−2,or1
Since the roots are real, |x−2|=1|x−2|=1
⇒x=1or3⇒x=1or3
sum of the roots=3+1=4

answer Nov 7, 2017 by Mogadala Ramana
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