Question

Preciso do desenvolvimento desta equação: 2x² - 9 = 0

Answer 1

2x²-9=0
2x²=9
x²=9/2
x=+√9/2
x=+3/√2 × √2/√2
x=+3√2/2

Answer 2

$2x^2-9 = 0$
$2x^2 = 9$
$x^2=\dfrac{9}{2}$

$x = \sqrt{\dfrac{9}{2}$

$x =\pm\dfrac{3}{\sqrt{2}}$

$x =\pm\dfrac{3}{\sqrt{2}}\cdot\dfrac{sqrt{2}}{sqrt{2}}$

$x =\pm\dfrac{3\sqrt{2}}{2}$