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IRISSAK [1]
3 years ago
10

Which of these represents a quadratic polynomial with exactly two zeros given by - 21 and 2i?

Mathematics
2 answers:
weqwewe [10]3 years ago
8 0

Answer:

B. x² + 4

Step-by-step explanation:

(0+/-√-16)2

+/- 4i / 2

+/- 2i

spin [16.1K]3 years ago
8 0

Answer:

B

Step-by-step explanation:

(x + 2i)(x - 2i)

= x² - 2ix + 2ix - (2i)²

= x² - 4i²

= x² -4(-1)

= x² + 4

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A school typically sells 500 year books in a year for $50 each. the economics class does a project and discovers that they can s
zysi [14]

The answer is $40

500*50x=25,000

625*40x=25,000

7 0
3 years ago
Numbers like 10, 100, 1000 are called?
Y_Kistochka [10]
Those number are all powers of 10
10= 10^1
100= 10^2
1000= 10^3
and so on...
5 0
4 years ago
Read 2 more answers
Need help with all questions.
agasfer [191]
Im in your class at school im kayla
8 0
3 years ago
How does the graph of g(x)=x+4 compares with the graph of the parent function, f(x)=x?
irakobra [83]

The graph of g(x) is shifted 4 units up ⇒ answer a

Step-by-step explanation:

Let us revise the translation

  • If the function f(x) translated horizontally to the right by h units, then its image is g(x) = f(x - h)  
  • If the function f(x) translated horizontally to the left by h units, then its image is g(x) = f(x + h)  
  • If the function f(x) translated vertically up by k units, then its image is g(x) = f(x) + k  
  • If the function f(x) translated vertically down by k units, then its image is g(x) = f(x) - k  

∵ The parent function f(x) = x

∵ g (x) = x + 4

- Substitute x in g(x) by f(x)

∴ g(x) = f(x) + 4

- g(x) is f(x) add by 4

- by using the rule of translation above

∵ g(x) = f(x) + k

∵ k = 4

∴ g(x) is the image of f(x) after translation 4 units up

∴ The graph of g(x) is 4 units above the graph of f(x)

The graph of g(x) is shifted 4 units up

Learn more:

You can learn more about translation in brainly.com/question/2451812

#LearnwithBrainly

4 0
3 years ago
Mike had 228 dollars to spend on 7 books. After
monitta

Answer:

$30

Step-by-step explanation:

We know that the cost of all of the books was 228 - 18 = 210 dollars because Mike had 18 dollars left over. Assuming that each book cost the same amount, we know that each book costs 210 / 7 = $30.

8 0
4 years ago
Read 2 more answers
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