Question

Решите, пожалуйста х⁴+х²=0​

Answer 1

$x^4+x^2=0\\x^2(x^2+1)=0\\1)~~x^2=0\Rightarrow x=0\\2)~~x^2+1=0\Rightarrow x^2=-1\Rightarrow x\notin \mathbb R\Rightarrow\\x=0.$