Question

If f (x) = 3x²-7 , find f(4)

Answer 1

Hello, 
To solve this function for f(4) we need to plug 4 into f(x) and the result will be our answer. We know that f(x) is $3x^2-7$. Plugging in 4 we get $3(4)^2-7=41$. Therefore, f(4)=41. Hope this helps!

Answer 2

What the question is asking you to do is plug in 4 in place of x in the given equation: 
$f (x) = 3(4)^2-7$
$4^2=16*3-17=41$
Final answer: 41