All categories

3 years ago

Please explain this type of problem (1+2i)(1+3i)

Mathematics

1 answer:

zhuklara [117]3 years ago

7 0

Answer:

-5(1-I) is the answer

Step-by-step explanation:

(1+2i)(1+3i)

1(1+3i)+2i(1+3i)

1+3i+2i+6i^2

As i^2=-1

1+5i+6(-1)

1-6+5i

-5+5i

Taking -5 as common

-5(1-i)

I hope this will help you :)

You might be interested in

These table of values represent continuous functions. For which function will the y values be the greatest for very large values

Alenkasestr [34]

The answer is C as the numbers for y increase greatly when the number of x increase

4 0

2 years ago

Read 2 more answers

I need help!!! What is Sin^-1 (7)

masya89 [10]

Answer: the number should be less than 1 and more than -1

sin^-1(7) doesn't exist

Step-by-step explanation:

3 0

2 years ago

Ill give brainliest if you can help me quick!!!!

alexandr402 [8]

Answer:

Step-by-step explanation:

im not a pro but try it

5 0

2 years ago

Lilliana is training for a marathon. She runs the same distance every day for a week. On Monday, Wednesday, and Friday, she runs

iren2701 [21]

Answer:

Letting L = distance per lap

4L + 8 = 6L + 4

2L = 4

L = 2 miles

She runs 16 miles each day

2 miles per Lap = 8 Laps on Saturday

Step-by-step explanation:

3 0

2 years ago

Write the equation

Shkiper50 [21]

$a)\ the\ slope-intercept\ form:\ y=mx+b\\--------------------------\\m=\frac{2}{3}\Rightarrow y=\frac{2}{3}x+b\\\\the\ point\ (-3;\ 6)\Rightarrow \frac{2}{3}\times(-3)+b=6\\\\-2+b=6\ \ \ \ \ |add\ 2\ to\ both\ sides\\\\b=8\\\\\boxed{y=\frac{2}{3}x+8}$

$b)\ the\ two-points\ formula:y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)\\-----------------------------\\the\ points:\ (3;-1);\ (5;\ 7)\\\\y-(-1)=\frac{7-(-1)}{5-3}(x-3)\\\\y+1=\frac{7+1}{2}(x-3)\\\\y+1=\frac{8}{2}(x-3)\\\\y+1=4(x-3)\\\\y+1=4x-12\ \ \ \ \ |subtract\ 1\ from\ both\ sides\\\\\boxed{y=4x-13}$

3 0

3 years ago

Read 2 more answers