Question

let f(x)=4x^2+4 and G(x)=3x+2.. Find the following. (f-g)(-3)=?

Answer 1

f(-3) = ...?

Answer 2

so do i put -3 everywhere x is for x?

Answer 3

?

Answer 4

Yes, f(-3) means plug -3 into where x's are

Answer 5

so -32

Answer 6

is that right?

Answer 7

is that going to be my answer?

Answer 8

That's wrong chlorophyll

Answer 9

(f-g)(-3) is not just f(-3) if that's what you meant.

Answer 10

so how do i do it correctly

Answer 11

f = 4x^2+4
g = 3x+2
f-g = (4x^2+4)-(3x+2)=4x^2-3x+6

Answer 12

Now replace all the xs by -3, and find what that equals, aka:
4*(-3)^2-3*(-3)+6, just evaluate this expression

Answer 13

ok one sec

Answer 14

4*9+9+6=36+15=51, if i did that right

Answer 15

so 51 is going to be my final answer?

Answer 16

yea, just check my work

Answer 17

no it was 47

Answer 18

GOOD JOBB!! See, this iw hy you always check.

Answer 19

No it is 51

Answer 20

No, it's not 47, it's Agent 47.

Answer 21

why are u messing with me lol

Answer 22

Here is the neutral guy.\[4(-3)^2 + 4 - (-9 + 2)\]\[\implies 40 -(-7)\]\[\implies 47\]@Agent47 ... erm... 47

Answer 23

Ok, i finally see it. i made a mistake a few steps before..
f-g = (4x^2+4)-(3x+2)=4x^2-3x+6 is wrong
f-g = (4x^2+4)-(3x+2)=4x^2-3x-6 is right

Answer 24

:)