Question

y=-x^2+9x-20

Answer 1

help me please

Answer 2

how do i use this?

Answer 3

What is the question. All you have is an equation that means nothing.

Answer 4

Are you trying to find the zeros?

Answer 5

if you want the zeros you can use the quadtratic formula
\[x=\frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }\]
y=ax^2+bx+c
since this doesn't factor quite well