The sum and the product of two numbers are 20 and 64 respectively, the difference of the number is?	Options:
A) 1  B) 6  C) 7  D) 8  E) 12
12xplanation:   x + y = 20   xy = 64   (x- y)2 = (x + y)2 - 4xy   (x- y)2 = 400 - 256 =&gt; (x - y) = 12   Answer: 12
<result>E</result>
The sum and the product of two numbers are 20 and 64 respectively, the difference of the number is?