Question

因式分解x^4+x^2+1

Answer 1

你好
我们设x^2=Y
则原式变为Y^2+Y+!=(Y+1)^2=(X^2+1)^2
谢谢

Answer 2

x^4+x^2+1=x^4+2x^2+1-x^2
=(x^2+1)^2-x^2
=(x^2+x+1)*(x^2-x+1)