Answer:
5 and -5
Step-by-step explanation:
We are given that -5,5,-3 and 8.
We have to find that which two numbers of the given data have same absolute value.
We now that absolute value of any number x is given by 
Let a number -2 then its absolute value

Absolute value of 5=
Absolute value of -5=
Absolute value of -3=
Absolute value of 8=
We can see that absolute value of and -5 are same .
Hence, 5 and -5 have same absolute value.