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Is the value of root4 2 or 2, -2 please answer it with correct explanation

Is the value of root4 
2 or 
2, -2
please answer it with correct explanation

Grade:11

1 Answers

Om Raga Datta
111 Points
3 years ago
The answer of root over 4 is only 2 because
root over any natural number would give us two values but we should consider only the magnitude of the rusultant solution 
i.e root over 4 = mod 2 or mod -2 = 2  or 2 
but it would be a different case if we would use a2-b2 formula to find the solutions.
 
i hope my answer was useful.
 

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