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Kay [80]
3 years ago
6

(2 + 5i)(2 + i) please help me to understand how to do it

Mathematics
1 answer:
Tpy6a [65]3 years ago
8 0
<span>(2 + 5i)(2 + i) 
= 4 + 10i + 2i + 5i^2
= 4 + 12i + 5i^2</span>
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Which property of multiplication is shown? 6 · 1 = 1 · 6
saw5 [17]

Answer: Commutative property of multiplication  

Step-by-step explanation: The problem 6 · 1 = 1 · 6 demonstrates the commutative property of multiplication.

In other words, the commutative property of multiplication says that changing the order of the factors does not change the product.  

So for example here, 6 · 1 is equal to 6 and 1 · 6 also equals 6.

Since 6 = 6, we can easily see that 6 · 1 must be equal to 1 · 6.

In more general terms, the commutative property of multiplication can be written as a · b = b · a where <em>a</em> and <em>b</em> are variables that can represent any numbers.

5 0
3 years ago
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The yearbook club had a meeting. The meeting had 30 people, which is one-third of the club. How many people are in the club?
kirill [66]

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3 years ago
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Given the following function, find <br> h(3).<br> h(t) = t2 − t + 7
g100num [7]

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Step-by-step explanation:

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h(3) = 3² - 3 + 7 = 9 - 3 + 7 = <em>13</em>

7 0
3 years ago
how many different scores are possible if darts are thrown at the target and each dart lands within a ring. Target: 3,6,9
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Given &lt;1 and &lt;2 are a linear pair, find the value of x if m&lt;1 = 2x-5 and m&lt;2 = 4x-7
Alecsey [184]

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32

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