Question

raízes da equação x2 -169 = 0.

Answer 1

$x^{2} - 169 = 0 \\ \\ \Delta = 0^2 - 4.1.(-169) \\ \Delta = 676 \\ \\ x = \frac{0 \pm \sqrt{676} }{2.1} = \frac{0+26}{2} \\ \\ x' = \frac{0 +26}{2} = \frac{26}{2} = 13 \\ \\ x'' = \frac{0-26}{2} = \frac{-26}{2} -13 \\ \\ \boxed{S= \{(-13;13)\}}$

Answer 2

$x^2-169 =0 \\ x^2 = 169 \\ x= \sqrt{169} \\ x=+-13$

S = {13, - 13}