SOLUTION: Find f(k) when f(x)=3x^2 + 4x + 5 I dont understand what to do with the f(k)? Please explain to me how to solve this problem.

Question 895015: Find f(k) when f(x)=3x^2 + 4x + 5
I dont understand what to do with the f(k)? Please explain to me how to solve this problem.
Found 2 solutions by reviewermath, harpazo:
Answer by reviewermath(1029) (Show Source): You can put this solution on YOUR website!
Q:
Find f(k) when f(x)=3x^2 + 4x + 5
A:
Simply replace x by k.
f(k)=3k^2 + 4k + 5
Answer by harpazo(655) (Show Source): You can put this solution on YOUR website!
f(k) means to replace every x you see in the function with k.
f(k) = 3x^2 + 4x + 5
f(k) = 3k^2 + 4k + 5
Did you follow?
For more practice, do this one on your own.
Find f(apple) = 3x^2 + 4x + 5.
Replace every x with apple and you're done.

RELATED QUESTIONS
Please help me solve: Find f(k-1) when f(x) = 4x^2 - 3x +... (answered by Theo)
evaluate each function for the value specified f(x)=x^2-7x+10, find (a)f(0),(b) f(5),... (answered by funmath)
Could you please help me with this problem i dont understand it use f(x)={{{4x^-5}}} (answered by stanbon)
I kind of understand how functions work but this is just confusing and I dont understand... (answered by Jk22)
Could you please help me with this problem i dont understand it -5 (answered by stanbon)
Given the function f described by k(x)=x+12 find the function value. k(0)= Help... (answered by scott8148)
Hi, I'm in a hybrid math class at my college, so i don't get to see my teacher for... (answered by ewatrrr,Edwin McCravy)
Hello to all! I have been tackling this problem for the past 4 hours, and sadly with no... (answered by greenestamps,ikleyn)
Could someone help me with the following problem? Problem : A quadratic funtion... (answered by jim_thompson5910)