Question 937672: Find complex conjugate and the product of conjugates, for: sqrt(5)-4i
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! sqrt(5) - 4i
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complex conjugate:
sqrt(5) + 4i
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product of conjugates (p):
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p = (sqrt(5) - 4i) * (sqrt(5) + 4i)
p = sqrt(5)*sqrt(5) + sqrt(5)*4i - sqrt(5)*4i - 4i*4i
p = 5 - 16ii
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recall that i = sqrt(-1) and ii = -1
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p = 5 - 16(-1)
p = 5 + 16
p = 21
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