What is the purpose of multiplying a complex number by its conjugate?
Tutorial - Dividing complex numbers ex 19, 6i/(3 - i)

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Mathematics
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11th Grade - University
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Hard
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To add the real parts
To achieve the difference of two squares
To eliminate the real part
To increase the magnitude
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When multiplying complex numbers, what happens to the middle terms in the difference of two squares?
They become imaginary
They cancel each other out
They are squared
They are doubled
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the value of i squared in complex numbers?
0
i
1
-1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you simplify the expression after dividing by the common denominator?
Multiply by the numerator
Subtract the imaginary part
Add the real and imaginary parts
Divide each term separately
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the final expression, what form should the complex number be written in?
i(a + b)
bi + a
a - bi
a + bi
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