3 years ago

What is the square of the imaginary number 3i?

Mathematics

2 answers:

Gwar [14]3 years ago

8 0

Answer:

-9

Step-by-step explanation:

Illusion [34]3 years ago

5 0

−
9
Explanation:
(
3
i
)
2
=
9
i
2
i
2
=
−
1
,
therefore,
9
i
2
=
9
⋅
(
−
1
)
=
−
9

You might be interested in

Given a sphere with a radius of 2 cm, find its volume to the nearest whole

Anton [14]

Answer: 34

Step-by-step explanation:

$V=\frac{4}{3}(\pi)(2^{3}) \approx \boxed{34}$

7 0

2 years ago

The equation above shows how temperature F, measured in degrees Fahrenheit, relates to a temperature C, measured in degrees Cels

Murrr4er [49]

Answer:

I (even though you said not to worry about dis question) will try and answerrrrrrrrrrrrr-

I would say- hmmm- B.) II only aka A temperature increase of 1 degree Celsius is equivalent to a temperature increase of 1.8 degrees Fahrenheit.

6 0

2 years ago

The graph shows the location of point P and point R. Point R is on the y-axis and has the same y-coordinate as point P. Point Q

Mumz [18]

Answer:

n = 5

Step-by-step explanation:

Coordinate of P = (n,3)

R is on y-axis & the y-coordinate of P & R are equal. So coordinate of R = (3,0)

Coordinate of Q = (n,-2)

Using distance formula,

Distance between P & Q =

$\sqrt{ {( n - n}) ^{2} + {( 3- ( - 2) })^{2} }$

$= > \sqrt{ {(3 + 2)}^{2} } = \sqrt{ {5}^{2} } = 5$

Distance between P & R =

$\sqrt{ {(n - 0)}^{2} + {(3 - 3)}^{2} }$

$= > \sqrt{ {n}^{2} } = n$

But in question it is given that distance between P & Q is equal to the distance between P & R. So,

$n = 5$

8 0

3 years ago

Dennis wants to buy a card for his wife. Dennis calculates the amount of the card as $4.50. The actual price of a card is $4. Wh

Alex17521 [72]

Answer:

12.5%

Step-by-step explanation:

$4.50-$4/$4 x 100%

0.5/4x100%

50/4= 25/2 = 12.5%

8 0

3 years ago

What is 3+3-2? The problems are getting harder. :(

liq [111]

Answer:

Order of Operations is what you have to use

8 0

3 years ago

Read 2 more answers