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
PolarNik [594]
3 years ago
10

Simplify (3 + 2i)(7 − 5i).

Mathematics
2 answers:
erma4kov [3.2K]3 years ago
8 0
Rule needed: i^2 = -1
Standard form a + bi

(3 + 2i)(7 - 5i) FOIL
3 * 7 = 21
3 * - 5i = - 15i
2i * 7 = 14i
2i * -5i = - 10i^2 = - 10 * -1 = 10
Putting it all back together.
31 - i
swat323 years ago
3 0
(3+2i)(7-5i) = 21 - 15i + 14i + 10 = 31 - i
You might be interested in
A cube has eight congruent faces.<br> true<br> false
bogdanovich [222]
False, it has 6 congruent faces
3 0
3 years ago
6 There were 35 children and 10 adults at a cookout. What is the ratio of children to total people at the cookout?
Grace [21]
7:9 because there are 35 children and 10 adults. Add 35 and 10 you get 35:45 then you simplify the ratio to get 7:9.
6 0
3 years ago
Divide 15 by v. Then, subtract 7.
rosijanka [135]

A is the correct answer

hope that helps:)

4 0
3 years ago
Read 2 more answers
Describe the transformation.
viva [34]

Answer:

Reflection

Step-by-step explanation:

It is reflecting across the Y axis. It is not a dialation, since it is the same shape, but not a different size. Its not rotation, because it wasnt rotated to get to the new shape. And it is not translation, because it is not exactly the same shape (the shape was mirrored)

7 0
3 years ago
Which fraction has a greater value than 0.4
grandymaker [24]

Answer:

0.4 as a fraction is 2/5, so as long as the fraction is greater than 2/5 then you are good

5/9 || 0.55

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • In a particularclass of 22 students, 10 are men. What fraction of the students in the class are
    11·2 answers
  • Write an equation in standard form passing through the points (-2, 0) and (-3, -1). I know the answer to the question, but I do
    8·1 answer
  • What is the value of 5 in 756? write and draw to explain how you know
    11·2 answers
  • What should the expression xy - 2x + z look like when you substitute in the values x
    15·2 answers
  • Which of the following is true for the statement "7 is an odd number"? Question 5 options: A) It's both an open and closed state
    9·1 answer
  • Which of the following eaquals 6000000 in scintific notation
    7·2 answers
  • Need Help Fast Please!!! :)
    9·1 answer
  • 99 is what percent of 718
    10·1 answer
  • 6
    8·1 answer
  • It is required that the production cost must be less than R123 505. Determine the number of devices that will be produced. Show
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!