SOLUTION: The function f is defined by f(x)= x^2-2x Find f(3a)

Algebra ->  Functions -> SOLUTION: The function f is defined by f(x)= x^2-2x Find f(3a)      Log On


   

Question 742612: The function f is defined by f(x)= x^2-2x
Find f(3a)
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=+x%5E2-2x, f%283a%29
evaluate by substituting then simplifying:
f%283a%29=+%283a%29%5E2-2%283a%29
f%283a%29=9a%5E2-6a