SOLUTION: I need your help on solving this, "Express sqrt -40 in terms of i.

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Question 762669: I need your help on solving this, "Express sqrt -40 in terms of i.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+sqrt%28+-40+%29+
When you have a minus inside the square root,
you have to split it up into 2 factors:
+sqrt%28-1%29%2Asqrt%2840%29+
Then you use the definition:
+sqrt%28-1%29+=+i+
So you have:
+sqrt%2840%29%2Ai+
Now do another factoring:
+sqrt%284%29%2Asqrt%2810%29%2Ai+
+2%2Asqrt%2810%29%2Ai+