Question 419742


10x^4-9x^2+2=0

=> 10x^4-5x^2-4x^2 + 2=0

=> 5x^2(2x^2-1)-2(2x^2-1)= 0

=> (5x^2 -2)(2x^2 -1) =0


x =  root(2/5) 
  =  - root(2/5)  
  =  root(1/2)
  = - root(1/2)