Question

Решите уравнение: 25x^4-10x^2+1=0

Answer 1

$\displaystyle 25x^4-10x^2+1=0\\(5x^2-1)^2=0\\5x^2-1=0\\5x^2=1\\\\x^2=\frac{1}{5}\\ \\x=б\frac{\sqrt{5} }{5}$