Question

2ч4-4х2=0 помогите пож.та

Answer 1

2x^4-4x^2=0

2x^2(x^2-2)=0

2x^2=0  или x^2-2=0

x=0               x^2=2

                     $x=+- \sqrt{2}$

Answer 2

$2x^4-4x^2=0 \\ \\ 2x^2(x^2-2)=0 \\ \\ x_1=0 \\ \\ x_{2,3}=б\sqrt2$