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
Over [174]
2 years ago
7

What is the answer to this? i can’t figure it out.

Mathematics
1 answer:
Svetach [21]2 years ago
8 0

9514 1404 393

Answer:

  25 +0i

Step-by-step explanation:

The conjugate of a complex number is that number with the sign of the imaginary part reversed.

For z = -3+4i, its conjugate z* is -3-4i. The product of z and z* is ...

  (-3 +4i)(-3 -4i) = -3(-3 -4i) +4i(-3 -4i)

  = 9 +12i -12i -16i² = 9 +16 = 25

The real part of the product is 25; the imaginary part is 0.

  (-3 +4i)(-3 -4i) = 25 +0i

_____

You may have noticed that (z)(z*) = |z|², the sum of the squares of the real and imaginary parts. It is always a non-negative real number.

You might be interested in
The circule by X^2 + Y^2- 2y-11=0
Sati [7]
X^2 + y^2 -2y-11=0

x^2 + y^2 -2y=11

x^2 + y^2 -2y + ? = 11 + ?

x^2 + y^2 -2y + 1 = 11 + ?

x^2 + y^2 -2y + 1 = 11 + 1

x^2 + (y-1)^2 = 12

Solution: Circle
5 0
3 years ago
The length of a plot of land is
Firdavs [7]

Answer:

1/8 mile.

Step-by-step explanation:

That is 1/2 / 4

= 1 / 2 * 1/4

= 1/8 mile.

5 0
3 years ago
Please Help!<br> Write a equation for each hanger!
julsineya [31]

Answer:

Step-by-step explanation:

A: 2x = 3

B: w+1.3 = 2.7

C: 3y = 5.1

D: z+⅓ = ½

7 0
2 years ago
Keith exercises x hours a week. Troy exercises three hours less than Keith and Joe exercises two times more than Troy. Which exp
muminat
If you would like to know which expression represents the amount of time Joe exercises, you can calculate this using the following steps:

Keith ... x hours a week
Troy ... three hours less than Keith: x - 3
Joe ... two times more than Troy: 2 * (x - 3)

The correct result would be D) 2 * (x - 3).
7 0
2 years ago
Read 2 more answers
Can you help on word problems?
Ne4ueva [31]
Uh sure if you give me the problem I could help
4 0
3 years ago
Other questions:
  • The mouse weights​ (in grams) of a random sample of 100 mice involved in a nutrition experiment​ are: Interval 41.5----43.5 43.5
    10·1 answer
  • An algebraic expression for the sum of a number and 8
    9·1 answer
  • What is the total amount of square miles in europe?
    10·1 answer
  • PLEASE HURRRYY!!!!
    5·1 answer
  • 127. Ladder stability: From past mishaps, Seth knows his
    10·1 answer
  • What is 1 1/6 divided by 2 2/3 simplified
    9·2 answers
  • Dara spends $16 on tubes of paint and disposable brushes for an art project. Each tube of paint costs $3, and each disposable br
    13·2 answers
  • I just need it solve thats all
    10·1 answer
  • look at pic 10 pts will mark brainilest
    11·1 answer
  • Quick Math Problems Plz Help Solve For X (Show Ur Work If U Can)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!