SOLUTION: solve the equation identify any extraneous solutions x=[3x+40] [ ] means square root

Question 437549: solve the equation identify any extraneous solutions
x=[3x+40]
[ ] means square root
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
x=[3x+40]
[ ] means square root
-----------------------
x = sqrt(3x+40)
--
Square both sides:
x^2 = 3x+40
x^2-3x-40 = 0
x^2-8x+5x-40 = 0
x(x-8)+5(x-8) = 0
(x-8)(x+5) = 0
----------------------
X = 8 or x = -5
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Cheers,
Stan H.
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