Question

resolva as equacoes do 2 grau usando a formula geral a)x2-6x+9=

Answer 1

Formula Geral seria formula de Bhaskara

$x^{2} -6x +9 = 0$
$x = \frac{-b +ou- \sqrt{ b^{2} - 4 . a . c}}{2.a}$
Δ = b² - 4ac
Δ = 36 - 36
Δ = 0

X' = $\frac{-(-6) + \sqrt{0}}{2.1}$
X' = -(-3) +0
X' = 3

X" = $\frac{-(6) + \sqrt{0}}{2.1}$
X" = -3 +0 
X" = -3