x2-2000=750

Solution for x2-2000=750 equation:

x2-2000=750

We move all terms to the left:

x2-2000-(750)=0

We add all the numbers together, and all the variables

x^2-2750=0

a = 1; b = 0; c = -2750;
Δ = b2-4ac
Δ = 02-4·1·(-2750)
Δ = 11000
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{11000}=\sqrt{100*110}=\sqrt{100}*\sqrt{110}=10\sqrt{110}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-10\sqrt{110}}{2*1}=\frac{0-10\sqrt{110}}{2}
=-\frac{10\sqrt{110}}{2}
=-5\sqrt{110}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+10\sqrt{110}}{2*1}=\frac{0+10\sqrt{110}}{2}
=\frac{10\sqrt{110}}{2}
=5\sqrt{110}
$