Question

(√2х)^2=4

Помогите решить, очень надо

Answer 1

( √2x )^2= 2x
2x^2 = 4
x = -√2
x = √2

Answer 2

$( \sqrt{2} x)^{2} = 4$
$( \sqrt{2} )^{2} (x)^{2}= 4$
$2 x^{2} = 4$
$x^{2} = 2$
$x = \sqrt{2}$  и  $x = - \sqrt{2}$