Question

Equqção do 2° grau ײ+11×=+16×-6

Answer 1

Resposta:

x² + 11 x = 16x - 6

x² + 11x  -16x + 6 = 0

x² - 5x + 6 = 0

$x = \dfrac{-\,b \pm \sqrt{b^{2} - 4ac } }{2a}$

$x = \dfrac{-\,(-\,5) \pm \sqrt{(-5)^{2} - 4\times 1 \times 6 } }{2\times 1}$

$x = \dfrac{5 \pm \sqrt{25 - 24} }{2}$

$x = \dfrac{5 \pm \sqrt{1} }{2}$

$x = \dfrac{5 \pm 1 }{2}$

$x_1 = \dfrac{5 + 1 }{2} = \dfrac{6 }{2} = 3$

$x_2 = \dfrac{5 - 1 }{2} = \dfrac{4 }{2} = 2$