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Schach [20]
2 years ago
12

Evaluate the expression (3-2i)(3-2i) and write the result in the form a+bi ,where a is the real part of your answer and bis the

coefficient in front of the imaginary part

Mathematics
1 answer:
Maslowich2 years ago
4 0

Answer:

a = 5, b = -12

Step-by-step explanation:

By basic factoring, you get 9 - 12i + 4i^2. Since i^2 is simply -1, the expression evaluates to 9 - 12i - 4, which is 5 - 12i.

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Step-by-step explanation:

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3 years ago
Show all work to factor x^4 − 5x^2 + 4 completely.
Mademuasel [1]

Answer:

(x+1) (x-1) (x+2) (x-2)

Step-by-step explanation:

<u>Let u = x^2</u>

= u^2 - 5u + 4

<u>(Factor u^2 - 5u + 4)</u>

= (u-1) (u-4)

<u>Substitute back u = x^2</u>

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

<u>Factor x^2 - 1 and x^2 -4</u>

= (x+1) (x-1) (x+2) (x-2)

Hope this helped... :)

If you need to see the work for yourself, copy/paste this link

https://www.symbolab.com/solver/factor-calculator/factor%20x%5E%7B4%7D%20%E2%88%92%205x%5E%7B2%7D%20%2B%204%20

3 0
3 years ago
Read 2 more answers
What is the sum of three consecutive even numbers is 30?
kykrilka [37]
8, 10, 12

A helpful equation:
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Combine like terms
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Subtract 3 from each side
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Divide each side by to isolate x
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x = 9. However, 9 is not an even number. Let’s subtract 1 from 9 to get the first even number.

The first number is 8. The best two even numbers after 8 are 10 and 12.

8 + 10 + 12 = 30, thus this is the sequence.
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Answer:

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Step-by-step explanation:

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3 years ago
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