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2 solutions
The square root of 16 is also MINUS 4. And so 'minus 4' DOES equal 'minus 4'. The question is ambiguous.
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Hi Steven, the square root function is defined such that it returns the positive value only. Thus ( 4 ) 2 = ( − 4 ) 2 = 4 and not − 4 . Please go through this wiki for more details:
Does a square root have two values?
Root x^2 does not equal to x, for all of x is an element of real numbers. Root x^2 equals to the absolute value of x, for all of x is an element of real numbers. For anybody who doesn't know what it means (me at first, haha).
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Hahaha yes, I'm sorry but I didn't speak English fluently, so I don't know how to write some complex Math terms. Because that I prefer write in the "universal way". I'm Brazillian, sorry for the English :)
Ur thinking bout it all wrong. Ur making it too complicated
Are there not always to answers of a squareroot. You are going to get both a positive and negativ answer.
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Hi Lars, the square root function is defined such that it returns the positive value only. Thus ( 4 ) 2 = ( − 4 ) 2 = 4 and not − 4 . Please go through this wiki for more details:
Does a square root have two values?
assume that x = -2 , then x^2 = 4 ,sqrt(4) = 2 - therefore -2 not equal 2