Bailey Moore

1. Cộng đồng
2. Study Group
3. What does -∞ mean? (negative infinity?)

Oh, OK!  Thanks!   I don´t know if negative infinity was mentioned in any of the videos; I just saw it on a practice question.  I´ll go back and look.     *I have no idea why the apostrophe is an a...

1. Cộng đồng
2. Study Group
3. Quadratics (again; please help!)

Ok.  I have studied this so much, but I still cannot understand this last part.  Thank you SO much for taking the time to answer (I mean this sincerely). 

1. Cộng đồng
2. Study Group
3. Quadratics (again; please help!)

Wow.  I am still very confused.  Why would you divide?  This has been the hardest thing in math I have done.  Thanks for answering, though!

1. Cộng đồng
2. Study Group
3. Imaginary Numbers

Ok, so it is a matter of how simplified the answer is?     I have another question: Is √−5   i√5 or 5i?