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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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The shape can be broken into a rectangular prism and a triangular prism.

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Step-by-step explanation:

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5 0
3 years ago
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3 years ago
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