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
Alexxandr [17]
3 years ago
7

Which answer is equal to -2i*(-2i)? A) 4 B) -4 C) 4i D) -4i

Mathematics
2 answers:
Nadya [2.5K]3 years ago
6 0
I got letter B which is -4
butalik [34]3 years ago
4 0
\bf \textit{recall that }i^2=-1\qquad therefore
\\\\\\
-2i(-2i)\implies +2^2i^2\implies 4(-1)\implies -4
You might be interested in
Which of the following is a root of the polynomial shown below f(x)=x^3+2x^2-x-2
Aleks [24]
F(x) = x^3 + 2x^2 - x - 2 
<span>f(x) = x^2(x + 2) - (x + 2) </span>
<span>f(x) = (x^2 - 1)(x + 2) </span>
<span>f(x) = (x + 1)(x - 1)(x + 2) </span>
<span>Roots: -1, 1, -2 </span>
3 0
3 years ago
Read 2 more answers
At a rate of 4%, you paid $144.00 in interest over a two-year period. What was the original amount of your loan?
baherus [9]
Principal is the same as original amount. 
<span>1. You convert the rate % to a decimal number. (divide by 100) </span>

<span>2. Substitute: </span>

<span>P = 144 / (.04 x 2) </span>

<span>3. Solve: </span>

<span>P = 144 / .08 </span>
<span>P = 1,800 </span>

<span>4. Your answer is $1,800</span>
6 0
3 years ago
What is the total amount of RS.7500 at the rate of 5.5% per annum in 42 months?find it.
QveST [7]

Answer:

Please check out the attachments below to get the answer

7 0
3 years ago
HELPPP!!!!! PLEASEEE
Tpy6a [65]

Answer:

c

Step-by-step explanation:

4x = 20

--------------

4

x = 5

*20 divided by 4 equals 5*

3 0
3 years ago
Which shows 60^2 − 40^2 being evaluated using the difference of squares method?
DerKrebs [107]
D. The answer has to be 2,000, eliminating A and C. B doesn't even use the original equation, as well as incorrectly solving the method, so D is the correct answer, even if you don't understand the principles.
7 0
3 years ago
Read 2 more answers
Other questions:
  • 17. Four identical bags of cement and a
    5·1 answer
  • What is 3/4 divided by 5/6
    11·2 answers
  • There were 24 green jelly beans which made up 8%of all the jelly beans in the bag
    6·1 answer
  • Find the unit rate to the nearest cent per ounce compare a 24 ounce box of cornflakes cost $4.59
    10·1 answer
  • I BEG OF YOU, PLEASE HELP ME!!!!! My diploma is counting on it!!
    11·1 answer
  • Luis starts to do a division problem and notices that there is a pattern in the digits to the right of the decimal point.
    13·2 answers
  • Please help me with the problem​
    14·2 answers
  • On the school playground, the slide is 8 feet due west of the tire swing and 6 feet due south
    7·1 answer
  • If an object has a volume of 20 cubic inches and weights 28ounces what is the constant variation
    10·1 answer
  • Right triangles and trigonometry 21 pointe
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!