Question 64252
QUESTION:


if f(x) = 3x^2(squared) then find f(4) and f(3b)


ANSWER:


if f(x) = 3x^2(squared) then find f(4) and f(3b)


f(x) = 3 ( x )^2



To find f(4), replace x by 4 in the given equation as follows.


==> f(4) = 3 ( 4 )^2


==>      = 3 * 16


==>      = 48



To find f(3b), replace x by 3b in the given equation as follows.



f(3b) = 3 ( 3b )^2



      = 3 * 9 b^2

   
      = 27 b^2


If the second question is f(3), 


f(3) = 3 ( 3 )^2



     = 3 * 9



     = 27


Hope you understood.


Regards.


praseenakos@yahoo.co.in