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Nina [5.8K]
3 years ago
9

Find the product. (z + 3i)(z − 3i)

Mathematics
1 answer:
Doss [256]3 years ago
8 0

Answer:

First, we use distributive property:

(z+3i)(z-3i)=z^2-3zi+3zi-9i^2

Now, remember that i^2=-1, then

z^2-3zi+3zi-9i^2=z^2-9(-1)=z^2+9

Then,

(z+3i)(z-3i)=z^2+9

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X = 3 - y
bagirrra123 [75]

Answer:

A

Step-by-step explanation:

Given the 2 equations

x = 3 - y → (1)

5x - 12 = y → (2)

Substitute x = 3 - y into (2)

5(3 - y) - 12 = y ← distribute and simplify left side

15 - 5y - 12 = y

3 - 5y = y ( add 5y to both sides )

3 = 6y ( divide both sides by 6 )

\frac{3}{6} = y, that is

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Step-by-step explanation:

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A store owner recorded the number of tickets sold each hour. the graph shows some of the store owners data what is the slope of
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Answer:

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Step-by-step explanation:

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Since Richard is speaking, the inequality would look like this:

r > s

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Since Sylvia is speaking, the inequality would look like this:

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This means that Sylvia is younger than Richard.

We can flip one inequality to "see" them from the same perspective.

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Therefore, Richard is older than Sylvia.

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