If f(x) = k(x - k) and k is a constant, what is the value of f(5) - f(2), in terms of k?	Choose the correct choice from the following options.
A) 3k  B) k  C) 7k - 1  D) k^2 + k  E) k^2 - k
First, distribute f(x). k(x - k) = kx - k^2. Now evaluate f(5) and f(2):   f(5) = k(5) - k^2 = 5k - k^2   f(2) = 2k - k^2   f(5)-f(2)= 3k... 3knswer 3k (5)- (2)= 
<gadget id="calculator"> (5)- (2)</gadget>
<output>3</output>
3k... 3knswer 3k
<result>A</result>
If f(x) = k(x - k) and k is a constant, what is the value of f(5) - f(2), in terms of k?