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enot [183]
3 years ago
15

What is the value of (1+i) (1 - 1) 2 – 3 ?

Mathematics
2 answers:
nikitadnepr [17]3 years ago
8 0

Answer:

Step-by-step explanation:

(a + b)(a-b) = a² - b²

i² = -1

(1 + i)(1-i) = 1² - i²   = 1 - (-1) = 1 +1 = 2

\frac{(1+i)(1-i)}{2-3i}=\frac{2}{2-3i}\\\\=\frac{2*(2+3i)}{(2-3i)(2+3i)}\\\\=\frac{2*2+2*3i}{2^{2}-(3i)^{2}}\\\\=\frac{4+6i}{4-3^{2}*i^{2}}\\\\\frac{4+6i}{4-9*(-1)}\\\\=\frac{4+6i}{4+9}\\\\=\frac{4+6i}{13}\\\\=\frac{4}{13}+\frac{6}{13}i

fiasKO [112]3 years ago
7 0

Answer:

hi! your answer should be D

Step-by-step explanation:

I plugged the equation into a calculator and got D.

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goldenfox [79]

Answer:

10

Step-by-step explanation:

7 0
3 years ago
How can you write the equation for a linear function if you know only two ordered pairs for the function?
Vinvika [58]
1. m
2. One set of ordered pairs
3. b

To show why this is, I’m going to explain how to write the equation for a linear function with two random sets of ordered pairs - (1,0) and (5, 8).

First, find the slope. The formula for slope is m = (y2 - y1)/(x2-x1) where m is the slope and (x1, y1) and (x2, y2) are two sets of points.

This is why #1 is m. M is the letter used when finding slope.

To find m, I plug in the two sets of ordered pairs.

m = (8-0)/(5-1)
m = 8/4
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An equation for a line (linear function) is written in something called slope-intercept form. It looks like y = mx + b. m is the slope and b is the y-intercept (number y equals when x = 0). If m = 3 and b = 1, the equation would be y = 3x + 1.

Here, you have just solved for m and know it equals 2. Plug that value in for m.

y = 2x + b

To solve for b, plug one ordered pair in for x and y. I will use (1,0)

0 = 2(1) + b
0 = 2 + b
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Now that you know b = -2, plug that in for b.
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4 0
3 years ago
Which expression gives the magnitude of the magnetic field in the region c < r2 < b (at e?
BaLLatris [955]

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the magnetic field at a distance r from a long straight wire carrying current I can be calculated with the equation:

B = μ​​ ​I / 2 pi R​​

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3 years ago
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Ray Of Light [21]
<span>(triangle) ZYB to (triangle) OWR by sss</span>
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3 years ago
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Step-by-step explanation: Look at Picture



3 0
3 years ago
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