solving equations (1 Viewer)

[wgy182]

Hey
How do you solve x^4-2x^2+1=0?

Thanks in advance

 

[Makematics]

you make it (x^2 -1)^2=0 by inspecting it as a quadratic in x^2
x^2 - 1=0
x^2=1
x=1 or -1


Also that polynomials q is from 3 unit. i'll do it in a sec.

 

[wgy182]

Thanks
Oh sorry I will move it to the 3 unit thread