Find all zeros of the polynomial function. Use the Rational Zero​ Theorem, Descartes's Rule of​ Signs, and possibly the graph of the polynomial function shown by a graphing utility as an aid in obtaining the first zero or the first root. f left parenthesis x right parenthesis equals 2 x Superscript 4 Baseline minus 29 x cubed plus 63 x squared plus 149 x plus 55f(x)=2x4−29x3 63x2 149x 55