2x5-x4-20x3+10x2+18x-9=0

Question

2x5-x4-20x3+10x2+18x-9=0

Answer 1

х4(2х-1)-10х2(2х-1)+9(2х-1)=0

(х4-10х+9)(2х-1)=0

х4-10х+9=0                                                  2х-1=0

                                                                     2х=1

                                                                    х=0,5