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Ann [662]
2 years ago
12

If f(x) = x3 – 2x2, which expression is equivalent to f(i)?

Mathematics
1 answer:
Ahat [919]2 years ago
8 0

Answer:

2 - i

Step-by-step explanation:

Substitute i for x. Remeber i means imaginart number.

{i}^{3}  - 2 {i}^{2}

Use the Imaginary number exponents rules

{i}^{2}  =  - 1

{i}^{3}  =  - i

i {}^{4}  = 1

Simplify the equation.

- i - ( - 2)

- i + 2

Write as a complex number in form a+bi

2 - i

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this triangular prism has a length of 20 centimeters, an end base of 6 centimeters and an end height of 8 centimeters. what is t
pochemuha

Answer:

960

Step-by-step explanation:

LxWxH = v

V = 20x 6 x 8

7 0
3 years ago
An online music store is offering a promotion. When you spend $30 or more, you receive 3 songs for free. You Buy an album for $1
Lisa [10]

Answer:

need to spend $18 more in addition to $12

Step-by-step explanation:

Given: According to online music store, if you spend $30 or more, you receive 3 songs for free

To find: How much more money need to be spend in addition to $12 to receive three free songs

Solution:

Let x denotes amount to be spend in addition to $12 to receive three free songs

According to question,

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3 0
3 years ago
Find the area (shaded) and round to the tenths place if necessary.
fomenos

Answer:

9π - 9

Step-by-step explanation:

Depends on what the question stated was pi (π). The area of the circle is 9(3 squared) * π. the shaded area is the area of the circle - the area of the triangle. The area of the triangle is base * high / 2. If the diameter of the circle (6) is what we use as the base, then 3 would be the high, making the area 9. This means the shaded area would be 9π - 9.

6 0
3 years ago
Use f(x) = 1 - 4x + 1). Find f(-5)
steposvetlana [31]
F(-5)=(1 - 4(-5) +1 )
=1+20+1
F(-5)=22
6 0
3 years ago
Read 2 more answers
Help! explanation pls!!
My name is Ann [436]

Answer:

they are equat by alternet angle

3 0
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