Question

Math check

Answer 1

@Vocaloid or @dude please check these whenever you get a chance

Answer 2

Test: https://www.wolframalpha.com/input/?i=y+%3D+-x%5E2+-+2

Answer 3

Input the equations into Wolfram Alpha and click on Properties (should be on the right side of the output they give you, towards the top). It will show the vertex. The function is also graphed for you towards the middle of the page.

I highly recommend this site for checking your work. But encourage you to continue to learn and attempt the problems and not use this to do your work. Else, why pay for school if you aren't doing the learning?

Answer 4

These will work for the functions as well as solving for those complex roots.