Multiple Choice Questions on Evaluate the given equation 1 2i divide 1 2i ........ for NDA Exam Preparation

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Multiple Choice Questions

Evaluate the given equation 1 2i divide 1 2i ........

Mathematics (NDA) Complex Numbers
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Evaluate the given equation (-1 +2i) ÷(1-2i)?

-1

Correct Answer

1

Incorrect Answer

2

Incorrect Answer

-2

Incorrect Answer
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Explanation:

 Given expression, (-1 +2i) ÷ (1- 2i)  

= (-1 +2i)/(1- 2i) ×(1 +2i)/(1+ 2i) 

= (-1-2i+2i+4i2)/( 1+4) 

= (-1-4)/5 = -5/5 = -1 

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