May 7, 2015 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What's reputation …

Nov 17, 2013 · That's because the $9$ on the right hand side could have come from squaring a $3$ or from squaring a $-3$. So, when you square both sides of an equation, you can get …

Jan 2, 2022 · we can square both side like this: $ x^2= 2$ But I don't understand why that it's okay to square both sides. What I learned is that adding, subtracting, multiplying, or dividing both …

Apr 20, 2016 · 2 You can square it like that, and the equality will still hold - remember these expressions are equal, so squaring them mean they are still equal. This can, however, …

7 Short answer: We can't simply square both sides because that's exactly what we're trying to prove: $$0 < a < b \implies a^2 < b^2$$ More somewhat related details: I think it may be a …

5 days ago · If $\lambda<\sqrt 2,$ you can pick any number $>1$ of points in a unit square such that there is some pair of points with distance at least $\lambda.$ Maybe your title is wrong - it …

4 days ago · Continue to help good content that is interesting, well-researched, and useful, rise to the top! To gain full voting privileges,

I just came across this annotation in my school's maths compendium: The compendium is very brief and doesn't explain what this means.

I'm self-studying machine learning and getting into the basics of linear regression models. From what I understand so far, a good regression model minimizes the sum of the squared …

It is because the square is somehow "applied" on the function. For function, you will probably often encounter this notation, and that is because, it is the function itself that is squared, not …