Question

If f(x) = 2x^2 − 30, find f(4).

Answer 1

Basically, f(4) means that here x = 4

So:

Put x = 4 in the function:

\[f(4) = 2(4)^2 - 30\]

Now can you find its value ??

Answer 2

The second2 isanxponent.

Answer 3

Yes I understood that.
That is why I put 2 as power of 4..

Answer 4

I said to find the value..

Answer 5

I am doing flvs online school and i have to basicly teach myself, i dont understand it at all

Answer 6

What is \(4^2\) = ??

Answer 7

8?

Answer 8

nooooo nvm 16

Answer 9

\[4^2 = 4 \times 4 = ??\]

Basically power means multiply the base power times..

Answer 10

Yes:

\(2(16)\) = ??

Answer 11

Bracket shows here nothing but multiplication;

Okay in other way you can write it as:

\(2 \times 16\) = ??

Answer 12

32

Answer 13

Now last step:

\(32 - 30\) = ??

Answer 14

That will be the value for f(4).

Answer 15

so the answer is 2