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Art [367]
3 years ago
9

I WILL GIVE BRAINLIST!! Showthat (2x+i)(2x−i) = 4x2 +1

Mathematics
1 answer:
kherson [118]3 years ago
4 0

(2x + I) (2x-I) = 4x^2 + 1

Using the complex arithmetic rule:

(A + bi)(a-bi) = a^2 + b^2

A would be the 2x and b would be the i

So you would have:

(2x)^2 + (i)^2

(2x)^2 = 2x times 2x = 4x^2

i ^2 = 1

Final answer is 4x^2 + 1

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What is the next term of the geometric sequence. 135,45,15​
WINSTONCH [101]

Answer:

5

Step-by-step explanation:

Each term is 1/3 of the preceding term

135 / 3 = 45

45 / 3 = 15

15 / 3 = 5

5 0
3 years ago
Read 2 more answers
URGERNT HELP PLEASE!!?
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3 years ago
a carpenter sands 1/2 of a dresser in 3/4 of an hour. At this rate, how long does it take the carpenter to sand 1 dresser​
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Step-by-step explanation:

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3 years ago
The function rule C = 40n + 210 relates the number of months n to cost in dollars C of a phone plan and budget phone. Make a tab
Viefleur [7K]

Answer:

Input - Output

2 - $290

12 - $690

24 - $1170

Step-by-step explanation:

Cost after n months:

The cost after n months is given by the following function:

C(n) = 40n + 210

After 2 months:

This is C(2). So

C(2) = 40(2) + 210 = 80 + 210 = 290

After 12 months:

This is C(12). So

C(12) = 40(12) + 210 = 480 + 210 = 690

After 24 months:

This is C(24). So

C(24) = 40(24) + 210 = 960 + 210 = 1170

Table:

Input - Output

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12 - $690

24 - $1170

6 0
3 years ago
If 3x+2y=33 and 2x+3y=42 what does x+y equal?
xenn [34]

Answer:

15

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4 years ago
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