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Stels [109]
3 years ago
12

Factor over the complex numbers, if possible: x² + 2xyi - y2 What is the answer?

Mathematics
1 answer:
yanalaym [24]3 years ago
8 0

9514 1404 393

Answer:

  (x +yi)²

Step-by-step explanation:

Comparing the given expression to the square of a binomial, we can determine the given expression to be a square.

  (a +b)² = a² +2ab +b²

Here, we have a=x and b=yi. Then the factorization is ...

  x² +2xyi +(yi)² = (x +yi)²

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Which equation matches the graph shown?
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Answer:

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Step-by-step explanation:

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f(0)= -5 so we should have y+5 on left side

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6 0
3 years ago
Francine Flicka found a bargain when she bought a lawn mower. She paid the store's clerk three $20 bills and received him $7.45
adoni [48]

Answer:

  $48.97

Step-by-step explanation:

Let p represent the marked price of the mower. Then the price with tax is ...

  with tax = p + 7.3%×p = 1.073p

The amount Flicka paid is the amount tendered less the change she received, so is ...

  3×$20 - 7.45 = with tax = 1.073p

To find p, we can divide by its coefficient:

  (3 × $20 - 7.45)/1.073 = p ≈ $48.97

The selling price before taxes was $48.97.

_____

<em>Comment on the problem</em>

If you check the answer, you find the amount with tax is ...

  $48.97 × 1.073 ≈ $52.54481 ≈ $52.54

so the change Flicka would have received would have been $7.46, not $7.45. If the price were $48.98, then the change would have been $7.44. There is no price at which the mower can be marked that will make the total with tax come to $52.55. There is no solution to this problem.

5 0
3 years ago
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In a shipment of onions , 12% are damaged. 1114 onions are undamage. find the total number of onions in the shipment
katrin2010 [14]
Get on mathpapa is shows you the answer and how to explain it
3 0
3 years ago
When you sample the first individuals you can find, you call it a _____; it's cheap and easy to do, but statistically not a very
ZanzabumX [31]

Answer:

E.

simple random sample

Step-by-step explanation:

Simple random sample: Every member and set of members has an equal chance of being included in the sample. Random samples are usually fairly representative since they don't favor certain members.

3 0
3 years ago
Jerry paid $54.40 for 4 Circus tickets. Each ticket cost the same amount. What was the cost of each Circus ticket in dollars and
AnnyKZ [126]

Answer : 13.6

Each ticket

4 0
2 years ago
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