For how many unique pairs of nonnegative integers {a, b} is the equation a^2 - b^2 = 235 true?
Choose the correct choice from the following choices: A) 1 B) 2 C) 5 D) 7 E) 9
Answer 2   (a+b)(a-b)=235   2cases For (a+b), (a-b)   235, 1   47, 5   Answer 2
<result>B</result>
For how many unique pairs of nonnegative integers {a, b} is the equation a^2 - b^2 = 235 true?