The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is?  Pick:
A) 1  B) 6  C) 7  D) 8  E) 2
Explanation:   x + y = 25   xy = 144   (x- y)2 = (x + y)2 â€“ 4xy   (x- y)2 = 625 â€“ 576 =&gt; (x â€“ y) = 7   Answer: 7
<result>C</result>
The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is?