If (5+k)(5-k)=(5^2)-(2^3),then what is the value of K?	Choose one
A) 1 B) 3 C) 4 D) 2 E) 6
Obviously,It is in the formula a^2-b^2=(a+b)(a-b)   So k is 2   Option 2
<result>D</result>
If (5+k)(5-k)=(5^2)-(2^3),then what is the value of K?