Question

resolva as equações X² -5x+6=0

Answer 1

x² - 5x + 6 = 0

$\displaystyle \mathsf{\Delta = b^2 - 4.a.c}\\ \displaystyle \mathsf{\Delta = (-5)^2 - 4.(1).(6)}\\ \displaystyle \mathsf{\Delta = 25 - 24}\\ \displaystyle \mathsf{\Delta = 1}$

$\displaystyle \mathsf{x = \frac{-b \: \pm \sqrt{\Delta}}{2a}}}\\ \\ \displaystyle \mathsf{x = \frac{5 \:\ \pm \: 1}{2}}\\ \\ \displaystyle \mathsf{x' = 3}\\ \\ \displaystyle \mathsf{x'' = 2}$

Resposta: x = 2 ou x = 3