- #1

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## Main Question or Discussion Point

Hello,

My calculus book says that readers who are writting [tex]\sqrt{9}[/tex] as [tex]\pm3[/tex] must stop doing that, because it is incorrect. The question is: why is it incorrect?

Regards

My calculus book says that readers who are writting [tex]\sqrt{9}[/tex] as [tex]\pm3[/tex] must stop doing that, because it is incorrect. The question is: why is it incorrect?

Regards