Please help understand how to get these answers

4. Solve the Higher Degree Polynomial. List ALL of the Possible Rational Zeros, verify a rational zero using synthetic division, then use the depressed equation to find all zeros of the equation f(x) = 0. a. f(x) = 2x3 - 3x2 - 4x - 1 List PRZ: - 1, - 2, =,1; Zeros: - $, 1+ V2 b. f(x) = 3x3- 5x2 - 5x - 1 List PRZ: - 1, - 2, ,1; Zeros: - _, 1+ V2 c. f(x) = x# + 5x- + 2x - 8 List PRZ: - 8, -4, -2, -1, 1, 2, 4,8 ; Zeros: -4, -2, 1 d. f(x) = x3 - 7x-+ 16x -10