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
Olin [163]
3 years ago
13

Multiplying complex number I need help on 7 & 8

Mathematics
1 answer:
Alexxandr [17]3 years ago
3 0

Answer:

7.  35i^2 - 46i + 15

8. -15i^2-i -40

Step-by-step explanation:

hope this helps. :)

You might be interested in
The difference of the square of a number and 4 is equal to 3 times that number. Find the negative solution.
leonid [27]

The negative solution is x = –1.

Solution:

Let the number be x.

Square of a number = x²

3 times a number = 3x

Difference of square of a number and 4 = 3 times that number

\Rightarrow x^2-4=3x

Subtract 3x from both sides of the equation, we get

\Rightarrow x^2-3x-4=0

–3x can be written as x – 4x.

\Rightarrow x^2+x-4x-4=0

\Rightarrow( x^2+x)+(-4x-4)=0

1st bracket have common term x and bracket have –4 common term.

\Rightarrow x( x+1)-4(x+1)=0

Take common term x + 1 outside.

(x+1)(x-4)=0

<em>By zero factor principle, if AB = 0 then A = 0 or B = 0.</em>

x + 1 = 0,   x – 4 = 0

x = –1,   x = 4

The negative solution is x = –1.

7 0
4 years ago
Which expression is equivalent to -9a-10-6a+7−9a−10−6a+7
Gwar [14]

Answer:

−30a−6

Step-by-step explanation:

Let's simplify step-by-step.

−9a−10−6a+7−9a−10−6a+7

=−9a+−10+−6a+7+−9a+−10+−6a+7

Combine Like Terms:

=−9a+−10+−6a+7+−9a+−10+−6a+7

=(−9a+−6a+−9a+−6a)+(−10+7+−10+7)

=−30a+−6

BRAINLIEST. if you don't mind.

6 0
3 years ago
Triangles ABC and DEF are similar. what is the length of side EF
Leto [7]
The anwser is either 2.88 or 3, But others are saying it is 3.
8 0
3 years ago
Read 2 more answers
Which of the following statements is not always true? A. In a rhombus, both pairs of opposite sides are parallel. B. In a rhombu
Sunny_sXe [5.5K]
The correct answer is C. I just took a test and answered B but that is not the correct answer. it is actually C
8 0
3 years ago
What is 64 mi/h =_____ft/s ?
victus00 [196]
31.288889,because hours have 60 min,1 min have 60 seconds so you will do 64/60=1.066666667/60=.0177777778
6 0
3 years ago
Other questions:
  • Alyssa wants to know the gas mileage of her new car. She kept track of the number of miles she traveled and the number of gallon
    9·1 answer
  • I need help asap ( pt 1 )
    8·1 answer
  • Find the measure of a positive angle coterminal with - 240°.
    6·1 answer
  • Use similar triangles to solve. a person who is 5 feet tall is standing 99 feet from the base of a​ tree, and the tree casts a 1
    6·1 answer
  • What is the value of x in the equation 2(6х+4)- 6+ 2х = 3(4х+3) + 12<br> оооо
    5·1 answer
  • (2.1) 1. Write each repeating decimal using bar<br> notation.<br> a) 0.777 77...
    5·2 answers
  • Kira, goran, &amp; joe sent a total of 90 text messages during the weekend. Goran sent 5 fewer messages than Kira. Joe sent 3 ti
    9·1 answer
  • Convert: <br><br> 3 1/2 into an improper fraction =
    9·1 answer
  • What is the circumference of a circle with a diameter of 8 feet? Use 3.14 for<br> TT.<br> d = 8 ft
    7·2 answers
  • Please answer correctly! I will Mark you Brainliest!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!