Answer: 6
Step-by-step explanation:
Hello
All square numbers ends with 0,1,4,5,6 or 9 at units place.
For this case we must solve a system of two equations with two unknowns, given by "x" and "y".
We have:

We multiply (2) by -1:

We add (1) and (3):

Clearing x:

We substitute
in (2)

Thus, the solution of the system is 
Answer:
The solution of the system is 
Answer:
142
38
Step-by-step explanation: