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
Tomtit [17]
3 years ago
11

Find the conjugate of 2 - 5i and then calculate the product of the given complex

Mathematics
2 answers:
nlexa [21]3 years ago
7 0

Answer:

The conjugate is 2+5i and the product is 29.

Step-by-step explanation:

The conjugate of a complex number a+bi is a-bi

Our complex number is 2-5i.

Here, a = 2 and b = -5

Thus, the conjugate of 2-5i is

2-(-5i)=2+5i

Using this rule:

(a+b)(a-b)=a^{2}-b^{2}

And the fact that i^{2} = -1

We can find the product of any complex number and its conjugate:

(a+bi)(a-bi)=a^{2}  - (bi)^{2}=a^{2}  - b^{2} i^{2}  = a^{2}  + b^{2}

As our complex number is 2-5i, the product with its conjugate will be

2^{2} + (-5)^{2} =4+25=29

Troyanec [42]3 years ago
6 0
Okay yes but t is 29 and I hopes this helps good luck
You might be interested in
How can I use multiplication to find the quotient and evaluate the expression
adell [148]
When you divide two fractions, you do Keep, Change, Flip or KCF. So you keep the 3/5, you change the division sign to a multiplication sign, then flip the 3/15 to 15/3. So the new equation is 3/5x15/3. Then you simply the two sides so it becomes 1/1x3/1.....


Meaning the answer is 3.
8 0
3 years ago
What the area of this shape is. Please help need to be down by tomorrow!!
puteri [66]

The area of this shape is 12.

Area of a triangle = 1/2 x bh

b= base

h = height

So,

1/2 (6)(4)=12

Hope this helps!

7 0
2 years ago
Read 2 more answers
Help!! I am going to fail my class!!! I will mark you brainiest!
adoni [48]

Answer:

600,000(.90)       327,290

Step-by-step explanation:

6 0
3 years ago
A triangle has sides of length 2, 2, and 3. Which of the following is the measure of the obtuse angle of the triangle?
kramer

Answer:

97.18^{\circ}

Step-by-step explanation:

An obtuse angle in the triangle is opposite to the greatest side. The greatest side in the triangle with sides lengths 2, 2 and 3 is side with length 3. By the cosine rule,

3^2=2^2+2^2-2\cdot 2\cdot 2\cdot \cos \alpha,\\ \\9=4+4-8\cos \alpha,\\ \\-8\cos \alpha=9-4-4=1,\\ \\\cos \alpha=-\dfrac{1}{8},\\ \\\alpha\approx 97.18^{\circ}.

7 0
3 years ago
Is this correct? Bowmanian
BartSMP [9]
Yes it is correct!!!!
7 0
3 years ago
Read 2 more answers
Other questions:
  • A candy store called "Sugar" built a giant hollow sugar cube out of wood to hang above the entrance to their store. It took 5454
    13·1 answer
  • Which property is used in the statement?
    5·1 answer
  • What is the circumference of a circle with a radius of 56 inches
    8·1 answer
  • What are the solutions of 2x2 + 16x + 34 = 0?
    15·2 answers
  • What is the surface area of the cylinder?
    5·1 answer
  • X-8 mathematics expression
    11·1 answer
  • Can someone help me with this. Thx
    13·2 answers
  • How many of you guys think Into The Night by Bath & Body Works smells like men's cologne?​
    13·2 answers
  • BRAINLIEST if correct
    6·1 answer
  • Ahmad deposits $6000 into an account that pays simple interest at a rate of 5% per year. How much interest will he be paid in th
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!