9x-20=x there is a radical sign over 9x-20

The answer is x= 4, 5.. how do i calculate to get this answer.. Thank you
in Algebra 2 Answers by Level 1 User (320 points)

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1 Answer

sqrt(9x - 20) = x
9x - 20 = x^2
x^2 - 9x + 20 = 0
(x - 5)(x - 4) = 0
x - 5 = 0 or x - 4 = 0
x = 5 or x = 4
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