Question

If + = -1 , where x, y ≠ 0 then the value of ( x3 – y 3 ) is​

​

Answer 1

In order to estimate the value of x - y where x and y are real numbers with x > y > 0, Xiaoli rounded x up by a small amount, rounded y down by the same amount, and then subtracted her rounded values. Which of the following statements is necessarily correct?

A) Her estimate is larger than x - y

B) Her estimate is smaller than x - y

C) Her estimate equals x - y

D) Her estimate equals y - x

E) Her estimate is 0

Answer 2

Answer:

ans is 0

because their are two variable we can't solve it