Question

factorise - 2 x cube minus x square - 13 x minus 6​

Answer 1

2x cube - x square - 13x - 6

2x cube + x square - 2x square -x -12x-6

x squarer (2x+1)-x(2x+1)-6(2x+1)

(2x+1)(x square-x-6)

(2x+1)(x square-3x+2x-6)

(2x+1)(x-3)(x+2)

Answer 2

x-1 =0

x = 1

p ( 1} = 2 (1)³ -1²-13(1) -6

=2. -1-13-6

=1 - 13 - 6

= - 12 -6

= 18

18 is not a factor

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