To factor trinomials with 1 as the numerical coefficient of the leading term:
1 factor the leading term of the trinomial and write these as the leading term of the factors.
2 list down all the factors of the last term.
3 identify which factor pair sum up to the middle term;then
4 write factor pairs as the last term of the binomial factors.
1. xsquared + 10x + 16
answer = (x + 2 ) (X + 8)
hope it helps :)