Square Root Yields Two Answers

[mathdad]

if a>=0 then
sqrt(a^2)= a
However, if a<=0 then
sqrt(a^2)= |a|
Hope this helped :b

Yes, very helpful. Thank you.

 

[mathdad]

Mahdad forgets to review his "notes".

Who is mahdad?????

 

[ksdhart2]

if a>=0 then
sqrt(a^2)= a
However, if a<=0 then
sqrt(a^2)= |a|
Hope this helped :b

This isn't wrong per se, but definitely unnecessary. It's true in all cases that \(\sqrt{a^2} = |a|\) because \(|a| = a, \: \text{for} \: a \ge 0\)

 

[mathdad]

Thank you everyone.

 

[High-SchoolMath]

This isn't wrong per se, but definitely unnecessary. It's true in all cases that \(\sqrt{a^2} = |a|\) because \(|a| = a, \: \text{for} \: a \ge 0\)

Thanks, for the reply and giving another perspective, definately helpful :b

 

[Deleted member 4993]

Who is mahdad?????

"My dad" - with southern accent....