Question

x ao quadrado - 10 = 0
Resolva em bhaskara.

Answer 1

$x^2-10=0\\x^2=10\\\\\boxed{x=\pm\sqrt{10}}$

Answer 2

$x^2 - 10 = 0 \\ \\ a = 1 \\ b = 0 \\ c= -10 \\ \\ \boxed{\Delta = b^2 - 4.a.c} \\ \Delta = 0^2 -4*1*(-10) \\ \\ \Delta = 40 \\ \\ \boxed{x = \dfrac{-b\pm\sqrt{\Delta}}{2.a}} \\ \\ \\ x = \dfrac{0\pm\sqrt{40}}{2} \\ \\ x = \dfrac{\pm \sqrt{4*10}}{2} \\ \\ x = \dfrac{\pm 2\sqrt{10}}{2} \\ \\ \boxed{x = \pm\sqrt{10}}$