20000=x*1,0275^3

Solution for 20000=x*1,0275^3 equation:

20000=x*1.0275^3

We move all terms to the left:

20000-(x*1.0275^3)=0

We get rid of parentheses

-x*1.0275^3+20000=0

Wy multiply elements

-1x^2+20000=0

a = -1; b = 0; c = +20000;
Δ = b2-4ac
Δ = 02-4·(-1)·20000
Δ = 80000
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:

$\sqrt{\Delta}=\sqrt{80000}=\sqrt{40000*2}=\sqrt{40000}*\sqrt{2}=200\sqrt{2}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-200\sqrt{2}}{2*-1}=\frac{0-200\sqrt{2}}{-2}
=-\frac{200\sqrt{2}}{-2}
=-\frac{100\sqrt{2}}{-1}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+200\sqrt{2}}{2*-1}=\frac{0+200\sqrt{2}}{-2}
=\frac{200\sqrt{2}}{-2}
=\frac{100\sqrt{2}}{-1}
$