100-25x2=0

Solution for 100-25x2=0 equation:

100-25x^2=0

a = -25; b = 0; c = +100;
Δ = b2-4ac
Δ = 02-4·(-25)·100
Δ = 10000
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{10000}=100$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-100}{2*-25}=\frac{-100}{-50}
=+2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+100}{2*-25}=\frac{100}{-50}
=-2
$