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
oee [108]
3 years ago
7

Find all solutions to the equation equation (x - 1)^2 = -4.

Mathematics
1 answer:
tatuchka [14]3 years ago
6 0

Answer:

x = 1±2i

Step-by-step explanation:

(x - 1)^2 = -4.

Take the square root of each side

sqrt( (x - 1)^2) = sqrt(-4)

Sqrt(ab) = sqrt(a)sqrt(b)

We know the sqrt(4) = 2 and the sqrt(-1) = ±i

x-1 = ±2i

Add 1 to each side

x-1+1 = 1±2i

x = 1±2i

You might be interested in
I had 3 dollars,my mom gave me10 my dad gave me 30 my aunt and uncle gave me 100,i had another 7,how much did i have?
alisha [4.7K]

Answer:

150

Step-by-step explanation:

If you had 3 dollars plus the 10 your mom gave you would have 13. Then, if you dad gave you 30 that would be 43. Plus the 100 your aunt and uncle gave you would be 143. Plus 7 would be your answer of 150

6 0
3 years ago
glenn swims 2/3 miles on monday, 3/4mile on wednesday, and 5/6 miles on friday. What is the total of distance glenn swims on tho
Archy [21]

Answer:

She swam a total distance of 2  1/4 miles in those three days.

Step-by-step explanation:

Okay, so- The first thing you need to do is make all denominators equal to make these fractions able to be added together. So, I made all denominators 12. (Tell me if you don't know how to make them all the same denominator, and I'll be happy to help!)

<u>2/3  =  8/12   </u>

<u>3/4  =  9/12 </u>

<u>5/6  =  10/12</u>

Then, I added the numerators together. Like this:

<u>8 + 9 + 10 = 27 </u>

So, this would be:

<u>27/12</u>

Lastly, I changed this improper fraction to a mixed number. I multiplied the denominator twice because it looked like it would be closest to 27 without going over.

<u>12 * 2 = 24 </u>

<em>The "2" will be the whole number in the mixed fraction.</em> Now, I'm going to subtract 24 from the numerator.  

<u>27 - 24 = 3 </u>

<u>2 3/12</u>

After simplified, the fraction will be:

2 1/4  

<h3>Hope this helps! Let me know if you need help with something else or if you have questions about this problem !</h3>

8 0
3 years ago
B) The elephant
Misha Larkins [42]

Answer:

what!?!!!?!.!?!!!?!!.

3 0
3 years ago
Read 2 more answers
What percent of a circle is 3/4 of a circle
fredd [130]

A good way to think of it is in US quarters, 4 go into a dollar which is a whole or 100. Each quarter is 25 cents. Each quarter of a circle is 25%, so it would be 75%

4 0
3 years ago
Read 2 more answers
How do I evaluate each using the values given
qaws [65]

Answer:

(3) (1+1)/6

basically you just input the given numbers in x and y

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • A gym membership costs $25 to join and $14 each month. Write and use an algebraic expression to find the cost of the gym members
    15·1 answer
  • The price of an item has been reduced by 20%. The original price was 80% What is the price of the item now
    12·1 answer
  • Plzzzzz help it's an emergecy and plzzzzz show step by step
    14·1 answer
  • Area of a circle when the radius is 5
    6·2 answers
  • A cell phone tower casts a shadow 150 feet long. A tree nearby that is 30 feet tall casts a shadow that is 20 feet long. How tal
    5·2 answers
  • Which of the following scenarios represents a causation between the two data sets?
    10·1 answer
  • Clothing Online An online clothing company sells custom sweatshirts. The company charges ​$2.99 for shipping plus ​$6.00 for eac
    7·1 answer
  • PLS HELP!!!!!!!!!!!!!
    14·1 answer
  • You receive an allowance of $10 the first week of every month, and the
    13·1 answer
  • Ask...<br> Find the length of HK<br> HELPPPPP
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!