\(\sqrt{x}\) – \(\frac{6}{\sqrt{x}}\) = 1, find the value of x
The correct answer is: C
Explanation
\(\sqrt{x}\) - \(\frac{6}{\sqrt{x}}\) = 1
Multiply through by \(\sqrt{x}\)
x - 6 = \(\sqrt{x}\)
x - \(\sqrt{x}\) = 6
let \(\sqrt{x}\) = q, then x = q\(^2\)
q\(^2\) - q - 6 = 0
q\(^2\) - 3q + 2q - 6 = 0
q(q - 3) + 2(q - 3) = 0
(q - 3)(q + 2) = 0
q = 3 or -2
but x = q\(^2\), meaning, x = 9 or 4.