Question

Find rational roots of 2x³-x²-1=0

Answer 1

Answer:

differnciation gives faster result

Answer 2

Step-by-step explanation:

$2 {x}^{2} - {x}^{2} - 1 \\ putting \: x = 1 \: we \: get \: zero \: therefore \: (x - 1) \: is \: a \: factor \: of \: this \: polynomial \\ (x - 1)(2 {x}^{2} + x + 1) \\( x - 1)(imaginary \: roots) \\ rational \: root \: = 1$