Question:

How do you solve the following radical?

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√x-2 - √2x+3=0

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  1. the given can be re-written:

    sqrt(x - 2) = sqrt(2x + 3)

    x -2 = 2x + 3   (squared both sides)

    - 2  = x + 3       (subtract x for both sides)

    - 5  = x  

    but when checking, subtitute x = - 5 back into the original equation, we have sqrt(-7) and sqrt(-7) is not a real number.

    Therefore, the equation has no solution.


  2. Try to resolve it backwards, figure out x and square it,

    Hope it helped!

  3. (√x - 2) - (√2x + 3) = 0 :

    (xsquared - 4) - (2x + 9) = 0

    -3xsquared + 5

    -3xsquared = -5

    xsquared = 5/3

    x = √5/3

  4. square the equation

    x-2-2x+3=0

    -x+1=0

    -x=-1

    x=1

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