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
OlgaM077 [116]
2 years ago
7

Solve u^2 = -4, where u is a real number. Simplify your answer as much as possible.

Mathematics
1 answer:
alexdok [17]2 years ago
8 0

Answer:

2i and -2i

Step-by-step explanation:

I'll change u to x to be easier to understand.

x^2 = -4

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

sqrt(-4) = 2i, or -2i

You might be interested in
help! The steps to prove the Law of Sines with reference to ∆ABC are given. Arrange the steps in the correct order.
Usimov [2.4K]

Answer:

The correct order is given below

Step-by-step explanation:

1). Draw a perpendicular from point A to side BC. Let AD = h

2). sin A = h/c and sin C = h/a

3). h = c Sin A, h = a sin C

4). c Sin A =a sin C

5). Divide both side by Sin A * Sin C

6). c Sin A/(Sin A * Sin C) =a sin C/(Sin A * Sin C)

7). c/sin C = a/Sin A

8). Similarly prove that,  c/sin C = b/Sin B

9).  c/sin C =  b/Sin B = a/Sin A

3 0
3 years ago
If the volume of the cube was 27 (each side length is 3 units), what would the new volume be if each side length of the cube was
Nat2105 [25]

clapped

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Combining like term 6k+7k
Nadya [2.5K]
13k is the answer :)
8 0
3 years ago
a laptop computer is purchased for $1800. after each year the resale value decreases by 35%. what will the resale value be after
dolphi86 [110]

Answer:

1800-35%=1170

1170-35%=760,5

760,5-35%=494,325

494,325-35%=321,31

311,31-35%=208,85

after round it is 209

8 0
2 years ago
Read 2 more answers
In the figure below, EC || AB. Find the length of EC.
timofeeve [1]

Answer:

Letter a)

Step-by-step explanation:

quizlet

4 0
3 years ago
Read 2 more answers
Other questions:
  • Show that if A is​ invertible, then det Upper A Superscript negative 1det A−1equals=StartFraction 1 Over det Upper A EndFraction
    9·1 answer
  • A recipe calls for 2 2/3 cups of apple slices. Zoe wants to use 1 1/2 times this amount.
    5·2 answers
  • Simplify the expression c^-6 * d^4/ c^-16 * d^14​
    7·1 answer
  • 4 1/2 x 2 3/5 what is the answer simplified into fraction
    15·1 answer
  • Jessica jogged at a constant rate of 6 miles per hour how many miles will Jessica jog in 3 2/5 hours
    7·2 answers
  • 7. Find the perimeter of triangle FGH.
    14·1 answer
  • Help me please thanks
    13·1 answer
  • Find the 75th term of the following arithmetic sequence.<br> 12, 21, 30, 39,
    5·1 answer
  • Work out the reciprocal of <br><br> a) 2/9 <br><br> b) 2.5
    10·1 answer
  • |2x-19| = 4x + 1 answer with steps
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!