x^2+x+1=0 x^4+2x^2+1
问题描述:
x^2+x+1=0 x^4+2x^2+1
答
x^2+1=-x
x^4+2x^2+1
=(x^2+1)^2
=x^2
x^2+x+1
=(x+1/2)^2+3/4=0
x=-1/2±✓3/2i
x^2=1/4十3/4=1