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Let’s check out your problem:
What is
(
f
∗
g
)
(
x
)
(f * g)(x)
(
f
∗
g
)
(
x
)
?
\newline
f
(
x
)
=
−
x
2
+
4
x
f(x) = -x^2 + 4x
f
(
x
)
=
−
x
2
+
4
x
\newline
g
(
x
)
=
3
x
g(x) = 3x
g
(
x
)
=
3
x
\newline
Write your answer as a polynomial or a rational function in simplest form.
\newline
______
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Math Problems
Algebra 2
Add and subtract functions
Full solution
Q.
What is
(
f
∗
g
)
(
x
)
(f * g)(x)
(
f
∗
g
)
(
x
)
?
\newline
f
(
x
)
=
−
x
2
+
4
x
f(x) = -x^2 + 4x
f
(
x
)
=
−
x
2
+
4
x
\newline
g
(
x
)
=
3
x
g(x) = 3x
g
(
x
)
=
3
x
\newline
Write your answer as a polynomial or a rational function in simplest form.
\newline
______
Identify formula:
Identify the formula for
(
f
∗
g
)
(
x
)
(f * g)(x)
(
f
∗
g
)
(
x
)
.
(
f
∗
g
)
(
x
)
(f * g)(x)
(
f
∗
g
)
(
x
)
is the product of
f
(
x
)
f(x)
f
(
x
)
and
g
(
x
)
g(x)
g
(
x
)
.
(
f
∗
g
)
(
x
)
=
f
(
x
)
∗
g
(
x
)
(f * g)(x) = f(x) * g(x)
(
f
∗
g
)
(
x
)
=
f
(
x
)
∗
g
(
x
)
Given functions:
We have:
\newline
f
(
x
)
=
−
x
2
+
4
x
f(x) = -x^2 + 4x
f
(
x
)
=
−
x
2
+
4
x
\newline
g
(
x
)
=
3
x
g(x) = 3x
g
(
x
)
=
3
x
\newline
Now, we need to multiply these two functions to find
(
f
∗
g
)
(
x
)
(f * g)(x)
(
f
∗
g
)
(
x
)
.
\newline
(
f
∗
g
)
(
x
)
=
(
−
x
2
+
4
x
)
∗
(
3
x
)
(f * g)(x) = (-x^2 + 4x) * (3x)
(
f
∗
g
)
(
x
)
=
(
−
x
2
+
4
x
)
∗
(
3
x
)
Multiply functions:
Distribute
3
x
3x
3
x
to each term in the polynomial
−
x
2
+
4
x
-x^2 + 4x
−
x
2
+
4
x
.
\newline
(
f
∗
g
)
(
x
)
=
(
−
x
2
∗
3
x
)
+
(
4
x
∗
3
x
)
(f * g)(x) = (-x^2 * 3x) + (4x * 3x)
(
f
∗
g
)
(
x
)
=
(
−
x
2
∗
3
x
)
+
(
4
x
∗
3
x
)
Distribute terms:
Perform the multiplication for each term.
\newline
(
f
∗
g
)
(
x
)
=
−
3
x
3
+
12
x
2
(f * g)(x) = -3x^3 + 12x^2
(
f
∗
g
)
(
x
)
=
−
3
x
3
+
12
x
2
Perform multiplication:
Express your answer as a simplified polynomial.
\newline
The polynomial
−
3
x
3
+
12
x
2
-3x^3 + 12x^2
−
3
x
3
+
12
x
2
is already in its simplest form.
More problems from Add and subtract functions
Question
What is the midline equation of the function
\newline
h
(
x
)
=
−
3
cos
(
π
x
+
2
)
−
6
?
h(x)=-3 \cos (\pi x+2)-6 ?
h
(
x
)
=
−
3
cos
(
π
x
+
2
)
−
6
?
\newline
y
=
y=
y
=
Get tutor help
Posted 10 months ago
Question
−
2
i
⋅
(
2
+
6
i
)
=
-2 i \cdot(2+6 i)=
−
2
i
⋅
(
2
+
6
i
)
=
\newline
Your answer should be a complex number in the form
a
+
b
i
a+b i
a
+
bi
where
a
a
a
and
b
b
b
are real numbers.
Get tutor help
Posted 10 months ago
Question
(
4
)
+
(
14
−
4
i
)
=
(4)+(14-4 i)=
(
4
)
+
(
14
−
4
i
)
=
\newline
Express your answer in the form
(
a
+
b
i
)
(a+b i)
(
a
+
bi
)
.
Get tutor help
Posted 10 months ago
Question
(
−
13
+
16
i
)
−
(
3
+
4
i
)
=
(-13+16 i)-(3+4 i)=
(
−
13
+
16
i
)
−
(
3
+
4
i
)
=
\newline
Express your answer in the form
(
a
+
b
i
)
(a+b i)
(
a
+
bi
)
.
Get tutor help
Posted 10 months ago
Question
(
−
30
i
)
+
(
52
−
30
i
)
=
(-30 i)+(52-30 i)=
(
−
30
i
)
+
(
52
−
30
i
)
=
\newline
Express your answer in the form
(
a
+
b
i
)
(a+b i)
(
a
+
bi
)
.
Get tutor help
Posted 10 months ago
Question
(
−
3
+
71
i
)
+
(
9
)
=
(-3+71 i)+(9)=
(
−
3
+
71
i
)
+
(
9
)
=
\newline
Express your answer in the form
(
a
+
b
i
)
(a+b i)
(
a
+
bi
)
.
Get tutor help
Posted 10 months ago
Question
(
12
)
−
(
23
+
13
i
)
=
(12)-(23+13 i)=
(
12
)
−
(
23
+
13
i
)
=
\newline
Express your answer in the form
(
a
+
b
i
)
(a+b i)
(
a
+
bi
)
.
Get tutor help
Posted 10 months ago
Question
(
7
−
10
i
)
−
(
3
+
30
i
)
=
(7-10 i)-(3+30 i)=
(
7
−
10
i
)
−
(
3
+
30
i
)
=
\newline
Express your answer in the form
(
a
+
b
i
)
(a+b i)
(
a
+
bi
)
.
Get tutor help
Posted 10 months ago
Question
(
21
+
2
i
)
+
(
13
+
8
i
)
=
(21+2 i)+(13+8 i)=
(
21
+
2
i
)
+
(
13
+
8
i
)
=
\newline
Express your answer in the form
(
a
+
b
i
)
(a+b i)
(
a
+
bi
)
.
Get tutor help
Posted 10 months ago
Question
(
9
+
52
i
)
−
(
1
)
=
(9+52 i)-(1)=
(
9
+
52
i
)
−
(
1
)
=
\newline
Express your answer in the form
(
a
+
b
i
)
(a+b i)
(
a
+
bi
)
.
Get tutor help
Posted 10 months ago
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