Let the x power of 2 be1= t.
Then the x power of 4 is 1 = t 2.
So the original formula is t 2-t+ 1.
-3≤x≤2, so the range of t is1/4,8.
T 2-t+ 1 is the maximum value of a quadratic function.
So the answer is 3/4, 57