SOLUTION: Express in simplest form, in terms of i. 2[SQRT(-81)] - 2[SQRT(-100)] Please help with this question, i have no idea where to start! thanks!

Question 1128382: Express in simplest form, in terms of i. 2[SQRT(-81)] - 2[SQRT(-100)]
Please help with this question, i have no idea where to start! thanks!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Use these rules
Rule 1: by definition
Rule 2:
Rule 3: where x is nonnegative

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Use rule 2

Use rule 1

Use rule 3

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Answer: -2i
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