When you subtract one square number from another the answer is 7 what are the two numbers?

Let x be first number and y- second number. When you subtract first square number from second you get and it is equal to 7.

Hence
.

Find factors of right and left sides:.

Since you have that  
.
Add these equations: 
.
Then x=7-y=7-4=3.

The answer should be c