Short question!!!

[12345678]

If Y = √X, does 2√X = 2Y or Y²?
Using one example similar I would say Y² but can somebody explain why please?

 

[pka]

If Y = √X, does 2√X = 2Y or Y²?
Using one example similar I would say Y² but can somebody explain why please?

\(\displaystyle \text{If }Y=\sqrt{X}\text{ then }Y^2=X~\&~ 2Y=2\sqrt{X}~.\)

 

[12345678]

\(\displaystyle \text{If }Y=\sqrt{X}\text{ then }Y^2=X~\&~ 2Y=2\sqrt{X}~.\)

Thanks for the quick reply!!

 

[HallsofIvy]

For any number, A, "2A" means "2 times A", NOT "A times A".