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
snow_lady [41]
4 years ago
7

Evaluate x^2-2x+2 where x=1+i

Mathematics
1 answer:
KIM [24]4 years ago
8 0

x^2 - 2x + 2

x = 1 + i

(1 + i)^2 - 2(1 + i) + 2

<em><u>Distributive property.</u></em>

(1 + i)(1 + i) - 2 - 2i + 2

<em><u>Continue distributive property on left side.</u></em>

1 + i + i + i^2 - 2 - 2i + 2

<em><u>Combine like terms.</u></em>

1 + 2i + i^2 - 2 - 2i + 2

1 + i^2

<em><u>i^2 can be interpreted as -1.</u></em>

1 - 1 = 0

The expression is equal to 0.

You might be interested in
The circumference of a circle is 113.04 centimetres. What is the circle's radius?
Drupady [299]

Answer:

18 centimeters

Step-by-step explanation:

Divide the circumference by π, or 3.14 for an estimation. The result is the circle's diameter.

Divide the diameter by 2.

There you go, you found the circle's radius

6 0
2 years ago
Find the volume of a cylinder with a diameter 4 mm and a height 8 mm.
Rufina [12.5K]

Answer:100.53mm

Step-by-step explanation:

5 0
3 years ago
Find the radius of a sphere with a volume of 4.5 pi cubic centimeters
Norma-Jean [14]

Answer:

1.02

Step-by-step explanation:


5 0
4 years ago
Three right triangles are drawn in the coordinate plane,
SashulF [63]

Answer:

Triangle A:

- smaller leg = 3

- longer leg = 10

- hypotenuse = 10.4

Traingle B:

- smaller leg = 4

- longer leg = 13

- hypotenuse = 13.6

Triangle C:

- smaller leg = 5

- longer leg = 7

- hypotenuse = 8.6

Step-by-step explanation:

Let's find the distance of the legs for the 3 right triangles.

<u>Triangle A</u>

The smaller leg (SL) is from (2,5) to (2,8), so the length is given by the distance in the y-axis:

SL_{A} = 8 - 5 = 3

Hence, the lenght of the smaller leg is 3.

The longer leg (LL) is from (-8, 8) to (2, 8), so the length is given by the distance in the x-axis:

LL_{A} = 2 - (-8) = 10

Then, the length of the longer leg is 10.  

Now, we can find the hypotenuse (H) by using Pitagoras:

H_{A} = \sqrt{SL_{A}^{2} + LL_{A}^{2}} = \sqrt{3^{2} + 10^{2}} = 10.4

<u>Triangle B</u>

The SL is from (3, -9) to (7, -9)

The length of the SL is:

SL_{B} = 7 - 3 = 4

The LL is from (7, -9) to (7, 4)

The length of the LL is:

LL_{B} = 4 - (-9) = 13

The hypotenuse is:

H_{B} = \sqrt{4^{2} + 13^{2}} = 13.6

<u>Triangle C</u>

The SL is from (-10, -6) to (-10, -1)

The length of the SL is:

SL_{C} = -1 - (-6) = 5

The LL is from (-10, -6) to (-3, -6)  

The length of the LL is:

LL_{C} = -3 - (-10) = 7

The hypotenuse is:

H_{C} = \sqrt{5^{2} + 7^{2}} = 8.6

I hope it helps you!

5 0
4 years ago
Plssss help!!!!!!!!!!!
Arte-miy333 [17]
The answer is B. 70

you add the other 2 angles together and then subtract that from 180!!
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which binomial is a factor of c2−12c+32?
    5·1 answer
  • What is 0.83 ÷ 0.415 show ur work <br><br><br> help me pls
    9·2 answers
  • Nayati wants to swim 50 miles this school year. She plans to swim 1/4 mile each day. How many days will it take her to swim 50 m
    10·1 answer
  • What is the area of this triangle? please help me.
    12·2 answers
  • 4. The cosine function can be made to have the same values as the sine function for each angle by including a shifted _______ in
    13·1 answer
  • Joe flipped a coin 100 times. It landed heads
    6·2 answers
  • What is the value of x?<br> 84°<br> 75°<br> x+15°<br> x+96°<br> D<br> E<br> F<br> G<br> H
    15·1 answer
  • Help please! This has to do with the Pythagorean theorem.
    11·1 answer
  • Which equation can be used to solve for x in the following diagram
    9·1 answer
  • Please prove the following trigonometric identity.<br><br>​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!