SOLUTION: Simplify. Remember to use absolute-value notation when necessary. If a root cannot be simplified, state this. Please help I've been trying to figure this one out for 3 days now and

Algebra ->  Square-cubic-other-roots -> SOLUTION: Simplify. Remember to use absolute-value notation when necessary. If a root cannot be simplified, state this. Please help I've been trying to figure this one out for 3 days now and      Log On


   

Question 720949: Simplify. Remember to use absolute-value notation when necessary. If a root cannot be simplified, state this. Please help I've been trying to figure this one out for 3 days now and thank you for your help in advance.
-3 sqrt(-1000)
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

-3%2Asqrt%28-1000%29......you can write -1000 as -1%2A10%5E2%2A10

-3%2Asqrt%28-1%2A10%5E2%2A10%29....as you know sqrt%28-1%29=i and sqrt%2810%5E2%29=10; so, you have
-3%2A10%2Ai+%2Asqrt%2810%29
-30%2Ai%2A+sqrt%2810%29.....since sqrt%2810%29=3.1622776601683793319988935444327, you have
-30%2Ai%2A+3.1622776601683793319988935444327
-94.868329805051379959966806332982%2Ai...round it
-94.87%2Ai