x^2=1/20

Solution for x^2=1/20 equation:

x^2=1/20

We move all terms to the left:

x^2-(1/20)=0

We add all the numbers together, and all the variables

x^2-(+1/20)=0

We get rid of parentheses

x^2-1/20=0

We multiply all the terms by the denominator


x^2*20-1=0

Wy multiply elements

20x^2-1=0

a = 20; b = 0; c = -1;
Δ = b2-4ac
Δ = 02-4·20·(-1)
Δ = 80
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:

$\sqrt{\Delta}=\sqrt{80}=\sqrt{16*5}=\sqrt{16}*\sqrt{5}=4\sqrt{5}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-4\sqrt{5}}{2*20}=\frac{0-4\sqrt{5}}{40}
=-\frac{4\sqrt{5}}{40}
=-\frac{\sqrt{5}}{10}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+4\sqrt{5}}{2*20}=\frac{0+4\sqrt{5}}{40}
=\frac{4\sqrt{5}}{40}
=\frac{\sqrt{5}}{10}
$