W wgy182 Member Joined Dec 30, 2012 Messages 85 Gender Undisclosed HSC 2014 Jul 13, 2013 #1 Hey How do you solve x^4-2x^2+1=0? Thanks in advance Last edited: Jul 13, 2013
M Makematics Well-Known Member Joined Mar 26, 2013 Messages 1,829 Location Sydney Gender Male HSC 2013 Jul 13, 2013 #2 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. Last edited: Jul 13, 2013
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.
W wgy182 Member Joined Dec 30, 2012 Messages 85 Gender Undisclosed HSC 2014 Jul 13, 2013 #3 Thanks Oh sorry I will move it to the 3 unit thread
