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
Find the geometric mean of 16 and 36. Write your answer in simplest form. The geometric mean is​
Ede4ka [16]

Answer:

Step-by-step explanation:

the geo. mean is the nth root of the product of n numbers

Here there are two numbers; geo. mean is the square root of their product

g = √(16 * 36)

g = 4 * 6

g = 24

8 0
2 years ago
Factor each polynomial. Look for a GCF first
weeeeeb [17]

Answer:

20. x\left(x-6\right)\left(x+8\right)

22. 2\left(x+1\right)\left(x+4\right)

24. 5m\left(m-1\right)\left(m+7\right)

Step-by-step explanation:

20. x^3+2x^{2} -48x

The GCF is x, so you group it out of the equation first.

x(x^{2} +2x-48)

Then, you find 2 numbers that will equal to 2 when you add them and will equal to -48 when you multiply them.

?+?=2\\?*?=-48

The two numbers would be -6 and 8. You then differentiate the squares.

x\left(x-6\right)\left(x+8\right)

22. 2x^{2} +10x+8

The GCF is 2, so you must group it out.

2(x^{2} +5x+4)

Find the two numbers that will equal to 5 when you add them and will equal to 4 when you multiply them.

?+?=5\\?*?=4

The two numbers would be 1 and 4. Finally, differentiate the squares.

2\left(x+1\right)\left(x+4\right)

24. 5m^{3} +30m^2-35m

The GCF is 5m, so you must group it out.

5m(m^2+6m-7)

Find the two numbers that will equal to 6 when you add them and will equal to -7 when you multiply them.

?+?=6\\?*?=-7

The two numbers would be -1 and 7. Finally, differentiate the squares.

5m\left(m-1\right)\left(m+7\right)

7 0
2 years ago
I will upvote and give brainliest answer
zloy xaker [14]

Answer:

x=17

Step-by-step explanation

i just did the exact same question on a test and got it right .

6 0
3 years ago
If f(x) = 2x-4 and g(x) = x2 - 4x, find g(-4) And the (x2 - 4x) the 2 is a exponent
Luden [163]

Evaluate the given function in x=-4.

This is, replace the x in the function for -4 and find the value of g(-4).

\begin{gathered} g(x)=x^2-4x \\ g(-4)=(-4)^2-4(-4) \\ g(-4)=16+16 \\ g(-4)=32 \end{gathered}

The value of g(-4) is 32.

5 0
1 year ago
How do I prove that a quadrilateral is a rectangle?
maw [93]
I think you want to prove that a rectangle is a quadrilateral. You can prove this with definitions. The definition of a quadrilateral is that it is a shape with four sides. Since a rectangle has four sides, that proves that a rectangle is a quadrilateral. 
7 0
2 years ago
Read 2 more answers
Other questions:
  • Write an equation to describe the relationship between x and y.
    11·2 answers
  • 2. You order the combo plate of burger and fries at lunch for $9. If you
    7·2 answers
  • What is the area of ABC below? If necessary, round your answer to two decimal places.
    5·1 answer
  • The sum of two consecutive integers is less than 83. Find the pair of integers with the greatest sum.
    14·1 answer
  • Amanda Gorman already has plans to run for President. The expression that gives the year in which she hopes to do this is given
    5·1 answer
  • A video rental store charges a $20 membership fee and $2.50 for each video rented. Find the slope and y-intercept for the data.
    13·2 answers
  • Help me I don’t understand
    12·1 answer
  • I would like to know how to solve this problem.
    15·1 answer
  • Write a quadratic equation given the solutions -4,-6
    10·1 answer
  • -(-(8)))Explain how to answer
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!