0=-2.5p^2+550p

Solution for 0=-2.5p^2+550p equation:

0=-2.5p^2+550p

We move all terms to the left:

0-(-2.5p^2+550p)=0

We add all the numbers together, and all the variables

-(-2.5p^2+550p)=0

We get rid of parentheses

2.5p^2-550p=0

a = 2.5; b = -550; c = 0;
Δ = b2-4ac
Δ = -5502-4·2.5·0
Δ = 302500
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$p_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$p_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{302500}=550$
$p_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-550)-550}{2*2.5}=\frac{0}{5}
=0
$
$p_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-550)+550}{2*2.5}=\frac{1100}{5}
=220
$