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djverab [1.8K]
3 years ago
15

Multiply (6 + 2i)(6 - 2i)

Mathematics
2 answers:
Shtirlitz [24]3 years ago
8 0

Answer:

4i^2 - 36

Step-by-step explanation:

(6+2i)(6-2i)

(2i * 2i) = 4i^2

(2i * -6) = -12i

(2i * 6) = 12i

(-6 * 6) = -36

combine like terms

4i^2 - 36

Aleksandr-060686 [28]3 years ago
3 0

Answer:

40

Step-by-step explanation:

(6 + 2i)(6 - 2i)=40

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From the airport hanger H, an areoplane A is 18km away on the bearing of 115° while another aeroplane B is 29km away on a bearin
maks197457 [2]

The difference in distance between Aero plane A and B is; 34.67 km

<h3>How to calculate bearing?</h3>

To get the bearing;

∠H = (115 - 90) + (270 - 203)

∠H = 92°

Then, we will use cosine rule to get the distance between both Planes A and B.

d_ab = √(18² + 29² - 2(18 * 29) * cos 92)

d_ab = √(324 + 841 + 36.435)

d_ab = 34.67 km

Read more about bearing at; brainly.com/question/22518031

#SPJ1

6 0
2 years ago
Miguel has $49.13 in his bank account. He paid two fees of $32.50 each, and then he made two depositis of $74.25 each. What is t
mojhsa [17]

Answer:

$132.63

Step-by-step explanation:

$49.13 - ($32.50 × 2)

$49.13 - $65 = $-15.87

$-15.87 + ($74.25 × 2)

$-15.87 + $148.50

=$132.63

6 0
3 years ago
7n-4=31<br> So what does n represent?
Lorico [155]

Answer:

n=5

Step-by-step explanation:

7n-4   =     31

    +4        +4

7n  =  35

/7        /7

n=5

6 0
3 years ago
Consider the following system of equations: 10 + y = 5x + x2 5x + y = 1 The first equation is an equation of a . The second equa
aleksley [76]

Answer: The first equation is an equation of a parabola. The second equation is an equation of a line.

Explanation:

The first equation is,

10+y=5x+x^2

In this equation the degree of y is 1 and the degree of x is 2. The degree of both variables are not same. Since the coefficients of y and higher degree of x is positive, therefore it is a graph of an upward parabola.

The second equation is,

5x+y=1

In this equation the degree of x is 1 and the degree of y is 1. The degree of both variables are same. Since both variables have same degree which is 1, therefore it is linear equation and it forms a line.

Therefore, the first equation is an equation of a parabola. The second equation is an equation of a line.

5 0
3 years ago
Read 2 more answers
Pls answer quick I will give bainlyest to first GOOD answer
Helen [10]

Answer:

R1 - given

R2 - subtraction property of equality

R3 - distribution

S4 - 9x = 61

R5 - division prop. of equality

Step-by-step explanation:

hope this helps :)

5 0
3 years ago
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