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thanks for the help
I can work out that there must be
(x+2)(_______)
and that all constant variables must times up to 2 (y axis)
but i can't get anyfurther without trial and error
p.s. image didn't work well so
piont at (-3, -13)
x axis is -2
then turning piont to y axis 2
then turning piont to piont (1,3)
edit: just found out the anser if this helps
P(x) = (x+2)(x squared -x+1)
but i still don't know how to work it out