Only positive square root.

Eivind Hamre shared this question 7 months ago
Answered

When I write sqrt(x) I only get the graph on the positive side. Shouldn't this equation give two answers for x?(Since x^2 = (-x)^2)

Comments (2)

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it's by convention that 'sqrt' gives only the positive root. If you write it in symbols or draw the graph of y=sqrt(x) it is too, so not only in this GG software.

chris

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As Chris says sqrt(x) is a function so y=x^2 has these two separate solutions


x=+sqrt(y)
x=-sqrt(y)


If that wasn't the case you wouldn't write the “±” symbol in https://en.wikipedia.org/wi...

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