Question

factorise method 2 x cube -9x square+x+12

Answer 1

2 x cube -9x square+x+12

substitutuing x= -1, we get 0 hence (x+1) is  factor

dividing 2 x cube -9x square+x+12 by (x+1)

we get 2x^2-11x+12

hence factors are (x+1), (x-4),and 2x-3