If Xandy are integers and(x-y)=4, what is the main minimum possibile value of xy?

The answer is: a = about 63.59ft2 for 15

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.