SOLUTION: Please Solve This Problem: y²+400 = 0 In word form- Y to the 2nd power + 400 = 0 I need to get rid of the exponent but i have forgotten how please help me.

Algebra ->  Exponents -> SOLUTION: Please Solve This Problem: y²+400 = 0 In word form- Y to the 2nd power + 400 = 0 I need to get rid of the exponent but i have forgotten how please help me.      Log On


   

Question 620472: Please Solve This Problem: y²+400 = 0
In word form- Y to the 2nd power + 400 = 0
I need to get rid of the exponent but i have forgotten how please help me.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

+y%5E2+%2B+400+=+0

+y%5E2+=+-400

   y = ± sqrt%28400%28-1%29%29

   y = ± 20i         Note i = sqrt%28-1%29