SOLUTION: Which two expressions are equivalent? √-49, -7, -√49 By my calculations which are not always so good I came up with these two as equivalent √-49, -7.

Algebra ->  Radicals -> SOLUTION: Which two expressions are equivalent? √-49, -7, -√49 By my calculations which are not always so good I came up with these two as equivalent √-49, -7.       Log On


   

Question 82237: Which two expressions are equivalent?
√-49, -7, -√49
By my calculations which are not always so good I came up with these two as equivalent √-49, -7.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Sorreee!
sqrt%28-49%29+=+7sqrt%28-1%29 = 7i and this is not a real number.
-sqrt%2849%29+=+-7
So, -sqrt%2849%29 and -7 are equivalent.