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
NARA [144]
3 years ago
15

Simplify the expression (9 + 2i)(9 − 2i).

Mathematics
2 answers:
earnstyle [38]3 years ago
6 0

Answer:

81 - 4i^2

Step-by-step explanation:

(9 + 2i)(9 - 2i)

Multiply First number in First parentheses to the first number in the second set of parentheses.

Multiply first number in the first parentheses with the second number in the second parentheses.

So you'll have:

81 - 18i

Then multiply the second number from the first parentheses by the first number in the second parentheses.

And multiply the second number in first parentheses by the second number in the second parentheses.

So then you'll have:

81 - 18i + 18i - 4i^2

Combine like terms:

81 - 4i^2

Final answer is:

81 - 4i^2

mestny [16]3 years ago
5 0

Answer:

(9 + 2i)(9 − 2i) = 81 - 4i²

Step-by-step explanation:

a² - b² = (a + b)(a - b)

You might be interested in
What is the solution set of –|x| = –8?
valentinak56 [21]
8 or -8 either is true
4 0
3 years ago
Need help quick ASAP!!!
Dmitry_Shevchenko [17]
The answer is 3 and I'm just going to keep typing because I can't post under 20 characters
4 0
3 years ago
Read 2 more answers
Can I get some help please?
Travka [436]

Answer and Step-by-step explanation:

A) The first three terms are:

5, 8, 11

B) The tenth term is 32

You find the answer by plugging in the value for n. So for A), you would plug in 1, 2, and 3 (the first 3 terms), then to find the tenth term, you plug in 10 for n.

<em><u>#teamtrees #PAW (Plant And Water)</u></em>

3 0
2 years ago
Round 6.09933418366 to 4 decimal places
telo118 [61]

Answer:

6.113 i believe to be so

7 0
3 years ago
60°<br> 18<br> Solve for x. Round to the nearest<br> tenth.
weeeeeb [17]

Answer:

You need to include a picture or add more o the question because I can't solve it without the rest of the problem. All I know is 60 degrees and 18. But what is the 18?

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Which of the following functions is graphed below?
    7·1 answer
  • Assume that uâv=1uâv=1, â¥uâ¥=2â¥uâ¥=2, and â¥vâ¥=1â¥vâ¥=1. what is the value of 2uâ(10uâ6v)2uâ(10uâ6v)?
    13·1 answer
  • &gt; Next question
    9·1 answer
  • What is the value of n?<br><br><br><br> −6.5(n−5)=18.2
    10·1 answer
  • John's bank account was overdrawn. The status of his account was – $114. He did not realize the problem and wrote another check
    11·1 answer
  • In a triangle ABC, the measure of
    11·1 answer
  • Lebron scores 70% of his free throws. If he shoots 30 free throws, how many baskets will he make?
    13·2 answers
  • Find the value if x, will give brainliest !!
    10·1 answer
  • Two number cubes are rolled
    12·1 answer
  • Determine whether the triangle with given sides is right triangle or not
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!