Question

помогите решить, √х+1=х+5

Answer 1

$sqrt{x+1} = x - 5$
$x + 1 = (x-5)^2$
$x + 1 = x^2 - 10x + 25$ 
$-x^2 + 11x - 24 = 0$
$-(x-8)(x-3) = 0$
$(x-8)(x-3) = 0$ ⇒ $left { {{x1 = 8} atop {x2 = 3}} right.$
$x = 8$