P=x^2-3600

Solution for P=x^2-3600 equation:

=P^2-3600

We move all terms to the left:

-(P^2-3600)=0

We get rid of parentheses

-P^2+3600=0

We add all the numbers together, and all the variables

-1P^2+3600=0

a = -1; b = 0; c = +3600;
Δ = b2-4ac
Δ = 02-4·(-1)·3600
Δ = 14400
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$P_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$P_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{14400}=120$
$P_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-120}{2*-1}=\frac{-120}{-2}
=+60
$
$P_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+120}{2*-1}=\frac{120}{-2}
=-60
$