1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ann [662]
3 years ago
12

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

Mathematics
1 answer:
Ahat [919]3 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

You might be interested in
What is the answer to the q
Anton [14]

Answer:

yes

Step-by-step explanation:

the explanation is that a rhombus is a parallelogram in which all sides are equal. Their diagonals bisect each other at right angles.

6 0
3 years ago
PLEASE HELP I NEED A ASNSWER ASAP
stiks02 [169]
7 yes is a function
8 is not a function
7 0
3 years ago
A voice grade modem has a maximum data rate of 14,400 bps. What would be the maximum data rate of that modem if the number of po
max2010maxim [7]

The maximum data rate of that modem is doubled if the number of points in its constellation were doubled

According to statement

Modem has a data rate is 14,400 bps

we know that the data rate can be calculated by T=A/S

If a is Doubled then the data rate is also doubled.

Because A is directly proportional to the T and S is inversely proportional to T.

So, The maximum data rate of that modem is doubled if the number of points in its constellation were doubled

Learn more about DATA RATE here brainly.com/question/25109150

#SPJ4

7 0
2 years ago
You have invested $5000 in stocks and bonds. The interest you earned on the stocks was 7%. The interest you earned on the bonds
Sphinxa [80]
Money invested S + B = $5000 - - - - (a)
Money earned can be represented in S & B as follows:
0.07*S + 0.14*B =$500 - - - - (b)

Equations a & b are two equations with two unknowns.

From equation a:
S = 5000 - B
Replace S in equation b
0.07*(5000 - B) + 0.14*B =$500
0.07B = 500 - 350 = $150
B = 150/0.07 = $2142.86
S = 5000 - 2142.86 = $2857.14

Good luck
8 0
3 years ago
The figure below is a net for a rectangular prism. Side a = 21 inches, side b = 17 inches, and side c = 11 inches. What is the s
Nataly [62]

Answer:

The answer is 1,550

Step-by-step explanation:

First you find the area of the rectangle 1

Area = ab

=(21 in) (17in)

=357 sq in.

this will be the same for rectangle 3 = 357 sq. in.

next find the area of rectangle 2

area=ac

=(21 in) (11 in)

=231 sq in.

this will be the same for rectangle 4 = 231 sq. in.

next find the area of rectangle 5

area = bc

=(17 in) (11 in.)

=187 sq. in

this will be the same for rectangle 6 = 187 sq. in.

Next add all areas together

Total surface area = 2(ac) + 2(ab) + 2(bc)

= 2(231) sq in. + 2(357) sq in. + 2(187) sq. in

= 462 + 174+ 374

= 1550 sq. in

7 0
3 years ago
Other questions:
  • There are 12 inches in 1 foot and 5,280 feet in 1 mile. Elena ran 2 1/2 miles. How many inches is that? Please help!
    9·1 answer
  • Can someone help me please
    11·1 answer
  • alana found a sofa she wants to buy for her new apartment.the sofa cost $950.00 plus tax if Alana paid $999.40 for the sofa, wha
    13·1 answer
  • Is it posible for a system of linear equations to have exactly two solutions. true or false ?
    5·1 answer
  • Elaine had m dollars in her checking account. On December 8, she deposited $1,200, r dollars, and $568.90. She also cashed a che
    11·1 answer
  • The midpoint of GĦ is M(-3, 4). One endpoint is G(-2, 2). Find the<br> coordinates of endpoint H.
    8·1 answer
  • A classmate tells you that there are two Fahrenheit temperature that is the same as the Celsius temperature. They tell you it is
    9·1 answer
  • Which of the following best describes the solution to the equation below? 3(x+ 7) = 3x + 21​
    13·1 answer
  • Michelle throws a frisbee into the air. The height of the frisbee at a given time can be modeled by the equation h(t)= -2t
    14·1 answer
  • This chart shows the number of eggs laid each month by my pet chicken, Drakestail:
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!