Question 1013975
So how would I go about solving this quadratic equation:

y=-1x^2 - 10x

I know the axis of symmetry is -5 because x=-b/2a. When I try to find the y axis however, I get y=25. Is that right? if not, how would I solve this question?  Thanks for helping me!
<pre>No, that's incorrect! You just found the coordinates of the VERTEX, but you need the solutions/zeroes/roots, instead.
To find the solutions/zeroes/roots, you simply set the equation equal to 0, as follows: {{{- x^2 - 10x = 0}}}, and solve for x. 
You should get: {{{highlight_green(system(x = 0,x = - 10))}}}