Complex Numbers

$\left(x^4-2 x^2+25\right)\left(x^4-10 x^2+1\right)=0$

$\left(x^2-2 \sqrt{3} x+5\right)\left(x^2-2 \sqrt{3} x+1\right)=0$

$\left(x^4-2 x^2+25\right)\left(x^4+10 x^2+1\right)=0$

$\left(x^4-10 x^2+1\right)\left(x^4+2 x^2+25\right)=0$