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3 years ago

Help pls √-4 - √-25 Express complex numbers in terms of i

Mathematics

2 answers:

Bess [88]3 years ago

6 0

That would become 2i minus 5i which gives you negative 3i

kow [346]3 years ago

5 0

$i=\sqrt{-1}\\\\\sqrt{-4}=\sqrt{(4)(-1)}=\sqrt4\cdot\sqrt{-1}=2i\\\\\sqrt{-25}=\sqrt{(25)(-1)}=\sqrt{25}\cdot\sqrt{-1}=5i\\\\\sqrt{-4}-\sqrt{-25}=2i-5i=-3i$

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Mandarinka [93]

Answer:

The word "ARRANGE" can be arranged in

2!×2!

5040

=1260 ways.

For the two R's do occur together, let us make a group of R's taking from "ARRANGE" and permute them.

Then the number of ways =

=360.

The number ways to arrange "ARRANGE", where two "R's" will not occur together is =1260−360=900.

Also in the same way, the number of ways where two "A's" are together is 360.

The number of ways where two "A's" and two "R's" are together is 5!=120.

The number of ways where neither two "A's" nor two "R's" are together is =1260−(360+360)+120=660.

Step-by-step explanation:

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3 years ago

Read 2 more answers

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Elena-2011 [213]

16 because 2•0 is 0. 8-0 is 8 and 2(8) is 16

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3 years ago

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Alenkinab [10]

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2 years ago

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denis-greek [22]

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3 years ago

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vichka [17]

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The best answer is D.
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range (-∞, 0] ∪[0, ∞)

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3 years ago