Question 443315
I am not sure of your questions.

y=x^4-2x^2=x^2(X^2-2)=X^2(x+2^1/2)(x-2^1/2)
ans x=0 +sq root2, -sqroot2
You are asking q 1 2 3 4 later part with respect to q 3 or all of them?