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topjm [15]
2 years ago
7

Which of the following complex numbers is 2- equivalent to ? (Note: i= -1) 2+i

Mathematics
2 answers:
Vinvika [58]2 years ago
7 0

Answer:

A

Step-by-step explanation:

Given

\frac{2-i}{2+i}

Multiply the numerator/ denominator by the conjugate of the denominator.

The conjugate of 2 + i is 2 - i , then

= \frac{(2-i)(2-i)}{(2+i)(2-i)} ← expand numerator/ denominator using FOIL

= \frac{4-4i+i^2}{4-i^2}  [ i = \sqrt{-1} ⇒ i² = - 1 ]

= \frac{4-4i-1}{4+1}

= \frac{3-4i}{5}

= \frac{3}{5} - \frac{4}{5} i → A

muminat2 years ago
4 0

Answer:

i = the square root of -1

Step-by-step explanation:

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3 years ago
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lukranit [14]

Answer:

  it depends on what he means

Step-by-step explanation:

The friend needs to clarify the meaning of "if three lines intersect each other." If Line A intersects lines B and C, there will be two points of intersection, one at line B and one at line C.

If those lines are all in the same plane, and B and C are not parallel, so that line B intersects line C, then there will be a total of three points of intersection.

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If the meaning is "if there are three lines not necessarily in the same plane, and one intersects the other two (but those two don't intersect each other)", then there may be 1 or 2 points of intersection (allowing that all lines may intersect at the same point).

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3 years ago
HELP PLS!! this is geometry and I’m not sure how to do it!! So I was wondering is someone could help me solve these!!
romanna [79]

Answer:

I couldn't find questions.

You can follow me ask help

6 0
2 years ago
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A brand new filled can of chicken broth is 10 cm tall and has a radius of 10 cm. Mishka uses some of the broth to cook and now t
Maurinko [17]

we have chicken broth in cylindrical can.

we have given the height radius of cylindrical can.

h=10cm r=10 cm .

and she have 6cm broth height in the tin that means she had used 4 cm of height of broth .

now we need to find volume of two cylinder with h=10 cm and 6cm

and we need to find the difference between the volumes .

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