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
Delvig [45]
3 years ago
7

If x = a + bi and y = c + di, x × y = y × x.

Mathematics
1 answer:
Cloud [144]3 years ago
8 0
X = a + bi
y = c + di

                                      xy = yx
                   (a + bi)(c + di) = (c + di)(a + bi)
          a(c + di) + bi(c + di) = c(a + bi) + di(a + bi)
a(c) + a(di) + bi(c) + bi(di) = c(a) + c(bi) + di(a) + di(bi)
         ac + adi + bci + bdi² = ac + bci + adi + bdi²
            ac + adi + bci - bd = ac + bci + adi - bd
You might be interested in
The number of square feet per house are normally distributed with a population standard deviation of 137 square feet and an unkn
pshichka [43]

Answer:

Step-by-step explanation:

Given that X, the number of square feet per house is N(mean, 137)

Sample size = 19

Sample mean x bar =1350 sq ft

Since population std dev is given,

std error of sample = \frac{137}{\sqrt{19} } \\=31.43

Since sample size is small, t critical value can be used

df = 18

t value for 80% two tailed = 1.333

Margin of error = ±1.333(std error) = ±1.333*31.43\\=41.896

Confidence interval = sample mean ±margin of error

= 1350-41.896,1350+41.896\\=(1308.104,1391.896)

7 0
3 years ago
What is the midpoint of the segment show below?
slega [8]
B is the answer because if u subtact both x and y
3 0
3 years ago
Read 2 more answers
The cost of a pen at the office supply store is $2.65. The school store sells the pen for $3.45. How much does the school store
Julli [10]
The pen is what ever when you subtract them
3 0
3 years ago
PLEASE HELP ASAP WILL GIVE BRAINLEIST
juin [17]

Answer

it would be $20 a year so it would be a 4% interest rate

Step-by-step explanation:

6 0
2 years ago
Please help me please answer it correctly please answer it correctly
lesya [120]

Answer:

B

Step-by-step explanation:

=3+(-7)

=3-7

As 3 is a positive number(+), it is referred as it gained yards. 7 is referred as lost yards because it's a negative number(-).

Hope this will help ya!

5 0
2 years ago
Read 2 more answers
Other questions:
  • After completing the following frequency table, find the mode?
    10·1 answer
  • Find the area of the shaded portion in the square.
    15·2 answers
  • Please please helppppppppppppp
    5·1 answer
  • Sorry, I made a mistake on #2 of today's classwork. It should say how many kilograms are in 82.74 grams, not meters.
    5·2 answers
  • (05.01)A scale drawing of a living room is shown below. The scale is 1 : 40.
    7·2 answers
  • lucas and mateus have been collecting coins they find on the ground. lucas has $3.23 and mateus has $2.87. how much less money d
    8·1 answer
  • Please help what’s the answer
    15·2 answers
  • Please help, I will give brainliest to whoever helps!
    9·2 answers
  • Did I do this right? Pls help thx
    10·2 answers
  • Darlene had 1.56 pounds of beads to make bracelets. She gave 0.978 pounds to her friends. How many pounds of beads does she have
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!