SOLUTION: Ive been working on Algebra 2 homework for two hours now and need serious help with a few questions. like how to I express numbers in square root form in terms of i? Example

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Question 694023: Ive been working on Algebra 2 homework for two hours now and need serious help with a few questions.
like how to I express numbers in square root form in terms of i?
Example : 8 (square root symbol) -4 under the square root symbol

Found 3 solutions by stanbon, JBarnum, Alan3354:
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
8 (square root symbol) -4 under the square root symbol
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8*sqrt(-4)
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4 is a perfect square and its square root is 2
----
-1 is also a perfect square and its square root is "i".
----
So, 8sqrt(-4) = 8*(2i) = 16i
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Cheers,
Stan H.
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Answer by JBarnum(2146)   (Show Source): You can put this solution on YOUR website!
i is imaginary number equal to
so =====

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
8 (square root symbol) -4 under the square root symbol
----------------

=

------------
= 8*2*i
= 16i

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