Even the function, only one side is considered, and the other side is symmetrical.

X = 0, f(x) = 0, x = 1, f (x) = 0. When x tends to infinity, f(x) also tends to infinity.

0<x< 1, f (x) = x4-2x2+1+x2 = x4-x2, the extreme value is x 2 = 1/2, and f (1

X> 1, f (x) = x4-2x2+1-x2+1= x4-3x2+2, and the extreme value is x 2 = 3/2 and f (3/2) =-0.

So f(x) starts from 0, first drops to -0.25, then rises to 0, then drops to -0.25, and then rises to infinity.

Can you draw a picture according to the above?