how do you know if the solutions to a quadratic equation are inside, outside, on, inside and on, or outside and on the parabola??

Which is the completely factored from of xy^3-x^3y

What is the prime factorization of 23 ?me with this question

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years