Question

(raiz quadrada 5x+9) = (x-1)

Answer 1

$( \sqrt{5x + 9} ) = (x - 1)$
$7x + 8 - x^{2} = 0$
$- x^{2} + 7x + 8 = 0$
$x^{2} - 7x - 8 = 0$
aplique o delta

temos

x=7+/ - 9/2


x1=8
x2= -1