SOLUTION: Find all the real solution of the equation x^2-|x-1|-3=0

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Question 1031664: Find all the real solution of the equation
x^2-|x-1|-3=0

Found 2 solutions by ikleyn, Fombitz:
Answer by ikleyn(52788)   (Show Source): You can put this solution on YOUR website!
.
Find all the real solution of the equation
x^2-|x-1|-3=0
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

= .       (1)

1. Consider the domain x >= 1.
   In this domain |x-1| = x-1,
   and yours equation (1) becomes

    = ,  or

    = ,

   (x-2)*(x+1) = 0

   with the roots x = 2 and x = -1.

   Of them, only x = 2 belongs to the domain x >= 1.
   So, x = 2 is the ONLY solution of the equation (1) in this domain.


2. Next, consider the domain x < 1.
   In this domain |x-1| = -(x-1). 
   and yours equation (1) becomes

    = ,  or

    = .

   Find the roots using the quadratic formula.

    = ,   = .

   Of them, only  =  belongs to the domain x < 1.

   So,  =   is the ONLY solution of the equation (1) in this domain.

Answer.  The solutions are  x = 2  and  x = .


Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
when or
when or
So then,
when




Only one factor is in the range,


and when






Again only one factor is in the range,


.

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