Question

x-6=raiz quadrada de x

Answer 1

$x-6=\sqrt{x}\\(x-6)^{2} = (\sqrt{x})^{2}\\x^{2}-12x+36=x\\x^{2}-13x+36=0\\\\\Delta=169-144=25\\\\x= \frac{-(-13)\pm\sqrt(25)}{2}\\\\x_{1}= \frac{13+5}{2} =9\;\;\;\;\;\;\;\;\;\;\;x_{2}= \frac{13-5}{2} =4$