hi, i've done part of a question that i need help finishing. the question is:
use the factor theorem to show that is a factor of (which i did)
then it says:
write P(x) as a product of three linear factors.
now obviously (x - 2) is one of them so i found out what the equation was that had to be multiplied by (x - 2) to get and i came to and tried to factorise it further but couldn't. why can't i find two numbers that multiply to give -6 but add to give -1? surely this is the way to do it?
i looked at it again and i can't see why its two numbers that multiply to give -6 but add to give +1? the equation does come to to factorise it from there you need to multiply 1 from the by minus 6 (the constant) and then find two numbers that multiply to give -6 and add to give -1 (from the middle term). can anyone point me in the right direction here please?