Question

given f(x)=4x^2-3 and g(x)=-3x^2+4,find (f.g)(x)

AWAAAAARDDDD!!!1

Answer 1

\[f\circ g\] or \[f\times g\]?

Answer 2

F x g @satellite73

Answer 3

put a times sign between them
use parentheses

Answer 4

what do you mean like (fxg)?? @satellite73

Answer 5

can u demonstrate because i have 7 problems like this and i want to get a good grade @satellite73

Answer 6

what is ` (4x²-3) × (-3x²+4) ` ?

Answer 7

the first part, the `4x²-3` is f, and the second part, the `-3x²+4 `, is the g.

that is what they mean by f × g

Answer 8

all I am trying to say that in the following case,

\(\large\color{black}{ \displaystyle f(x)=4x^2-3 ~~~~{\rm and}~~~~ g(x)=-3x^2+42}\)

the (f×g)(x) is going to be

\(\large\color{black}{ \displaystyle (f×g)(x)=\left(4x^2-3\right)\times \left(-3x^2+42\right)}\)

Answer 9

so you are to multiply what f(x) is equal to, BY what g(x) is equal to.

Answer 10

is this making some sense?

Answer 11

yes it is ! so do i basically simplify it? @SolomonZelman

Answer 12

yes.

Answer 13

when you expand that product, tell me what you get:)

Answer 14

would it be something like 4x^2+2x-3? pr 6x^2-3 or just 4x^3-2 ?????? @SolomonZelman

Answer 15

you are multiplying....

Answer 16

(4x²−3) × (−3x²+42)

Answer 17

idk this topic sir , its really confusing @SolomonZelman

Answer 18

for this question :

Answer 19

@SolomonZelman ^^^^

Answer 20

8x³-12x² it would be for the problem you posted just now

Answer 21

i suggest to go back and review multiplication of variables with different coefficients and powers, factoring and all that.