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Kamila [148]
3 years ago
15

Perform the indicated multiplication below. Reduce terms and simplify. Include all of the necessary steps and calculations in yo

ur final answer.
(2 + i)(3 - i)(1 + 2i)(1 - i)(3 + i)
Mathematics
1 answer:
Andre45 [30]3 years ago
3 0
Complex numbers multiplication is commutative.
so 

given 
= (2+i)(1+2i) * (3-i)(3+i) * (1-i)

|(2+i)(1+2i)| has 5 as its absolute value and geometrically thinking its argument is pi/2. so

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

and obviously 

(3+i)(3-i) = 10

so the answer is 

50i * (1-i) = 50 + 50i

maybe, I think...
 

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What is the y-intercept of the line shown?
Vika [28.1K]

Answer:

The y-intercept is -1

Step-by-step explanation:

The y-intercept is the point at which the line crosses the y-axis and as it says in the question, "A line passes through the y-axis at -1"

Hope this helps :)

4 0
2 years ago
Factor xy + 3x - 2x^2 completely​
Contact [7]

Answer:x\left(y+3-2x\right)❤

Step-by-step explanation:

xy+3x-2x^2

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answer is:  x\left(y+3-2x\right)

I hope it's help!

8 0
3 years ago
Ralph is 3 times as old as Sara. In 4 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now. If x re
tino4ka555 [31]

Answer:

2x + 4

Step-by-step explanation:

Let R = Ralph's age

and x = Sarah's age

          Then Ralph's age in 4 years = R + 4

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Thus,                                       R + 4 = 2(x + 4)

Distribute the 2                      R + 4  =     2x + 8

Subtract 4 from each side     R        =     2x + 4

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3 0
4 years ago
What is the value of x? Enter your answer in the box. Photo attached.
marusya05 [52]

Answer:

sorry i can't help bc it doesn't show the picture to the problem

Step-by-step explanation:


3 0
3 years ago
What is the answer? I don’t understand this thing at all
barxatty [35]

Answer: 117.8 rounded to tenth

117.81 rounded to hundredth

Step-by-step explanation:

Pi * 10^2 * 135/360

4 0
3 years ago
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