Question

2x^2-4=0 решите уравнение

Answer 1

2x^2-4=0 
2x^2=4
x^2=2
x₁=√2
x₂=-√2

Answer 2

$2 x^{2} -4=0 \ 2( x^{2} -2)=0 \ x^{2} -2=0 \ (x- sqrt{2} )(x+ sqrt{2} )=0 \ x- sqrt{2} =0 \ x= sqrt{2} \ \ x+ sqrt{2} =0 \ x=- sqrt{2}$