SOLUTION: x=√(42 - x)

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Question 636124: x=√(42 - x)
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
x=√(42 - x)
square both sides
x^2 = 42 - x
Arrange as a quadratic equation
x^2 + x - 42 = 0
Factors to
(x+7)(x-6) = 0
Two solutions
x = -7
x = 6, this is the only valid solution