Question

$x = x {}^{2} - 6x + 9 =$

Answer 1

Oi, boa tarde!

$f(x) = x ^ 2 - 6x + 9$
$x ^ 2 - 6x + 9 = 0$

Calculando o delta:

$\Delta =b^2 - 4ac$
$\Delta =(-6)^2 - 4 * 1 * 9$
$\Delta =36 - 36$
$\Delta = 0 (x' = x")$

Encontrando as raízes:
$x = \frac{ - b \pm \sqrt{ \Delta }}{2a}$
$x = \frac{ - (-6) \pm \sqrt{0}}{2*1}$
$x = \frac{6}{2}$
$x' = x'' = 3$

S = {3}