Use synthetic division to verify the upper and lower bounds of the real zeros of f. 1.

Question:

Use synthetic division to verify the upper and lower bounds of the real zeros of f.
1. f (x) = x3 + 3x2 − 2x + 1
a) Upper: x = 1
b) Lower: x = - 4
2. f (x) = x3 − 4x2 + 1
a) Upper: x = 4
b) Lower: x = - 1
3. f (x) = x4 − 4x3 + 16x − 16
a) Upper: x = 5
b) Lower: x = - 3