How many pairs (x,y) of non-negative integers with 0\le x\le y satisfy the equation 5x^2-4xy+2x+y^2=624?
Answer Choices
A. 3
B. 4
C. 5
D. 6
E. 7
How many pairs (x,y) of non-negative integers with 0\le x\le y satisfy the equation 5x^2-4xy+2x+y^2=624?
Answer Choices
A. 3
B. 4
C. 5
D. 6
E. 7