Question

verify that x-y is a rational number; when x=7/9and y=-2/3.​

Answer 1

Answer:

Step-by-step explanation:

Step-by-step explanation:

(a) -5/12 - 2/3

(-5 - 8)/12

-13/12

(b) 7/9 - (-2/3)

7/9+2/3

(7+6)/9

13/9

Answer 2

Answer:

Step-by-step explanation:

If x-y is a rational no., then it means that x and y should be rational.

x-y= 7/9- (-2/3)

x-y= 7/9+2/3

x-y= 7+6/9

x-y= 13/9

Thus it means that x-y is rational as it can be expressed in p/q form where q is not equal to zero.