Question

f(x)=2x2+3 for f(-3) I tried and I got -9 but it was marked wrong and I tried again and got the same answer.

Answer 1

Is that your function?
\[\Huge f(x)=2\color{red}x^2+3\]

Answer 2

f(x) = 2x2 + 3

Answer 3

I don't think so

Answer 4

to find f(-3) replace the x in 2x^2 + 3 with -3 and simplify

f(-3) = 2*(-3)^2 + 3

Answer 5

It isn't displayed as an exponent

Answer 6

have you got a picture of the original question?

Answer 7

I copied and pasted this: 8.
Given f(x) = 2x2 + 3 find f(-3).

Answer 8

the answer would be -9 if the function was 2*x*2 + 3

Answer 9

Okay I will contact my teacher thank you for your help.

Answer 10

but since the answer is not -9 we must take the second '2' to be an exponent

Answer 11

OK