Question 451692
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
x^4-3x^2+2
Find all zeros
(x^2-3/2)^2 - 9/4 + 2 = 0
 (x^2-3/2)^2 = 5/4
 x^2-3/2 = ± sqrt(5)/2
 x^2 = (3/2 ± sqrt(5)/2)
   x = ± (3/2 ± sqrt(5)/2)
   x = 3/2 + sqrt(5)/2
   x = 3/2 - sqrt(5)/2
   x = -3/2 + sqrt(5)/2
   x = -3/2 - sqrt(5)/2