Question

factorise using factor theorem 2x^3-x^2-13x-6

Answer 1

let me explain frist check

equation at the end of step 1

( ( 2x cube -X square ) - 13 ) - 6

step 2 checking for a perfect cube are not

2.1 2x cube -x square - 13x-6 is a not a perfect cube

1. )-13x-6

2.)2xcube -X square

that is =?

now find the value

let 2x cube - X square -13x -6
5x square - 13x - 6
the remaining is = 0