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What is the real number of "a" equals to? What is the real number of "b" equals to?

 

 Sep 2, 2020
 #1
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First, we need to "rationalize" the denominator, but instead of square roots, we use 8i.

 

-1 - 4i / 8i (8i / 8i)

 

This is:

 

-1 - 4i / 8i (8i / 8i) = -1 - 4i ( 8i ) / 8i ( 8i) = - 1 - 4i ( 8i ) / - 8 = - 8i + 32 / - 8 = -8i / -8 + 32 / -8 = -4 + i

 

Now you should very well know what a and b are.

 

:)

 Sep 2, 2020

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