Question

determine as raízes da equação 2x2-
72=O,Sendo u=r

Answer 1

2x^2 - 72 = 0
2x^2 = 72
x^2 = 72 / 2
x^2 = 36
x = raiz de 36
x = 6

:))

Answer 2

$2 x^{2} -72=0\\\\\\ 2 x^{2} =72\to \\\\ x^{2} = \frac{72}{2} \to \\\\ x^{2} =36\to \\\\ x=\pm \sqrt{36} \to \\\\ x=\pm 6\\\\\\ S=(-6;6)$