x(2)=9/100

Solution for x(2)=9/100 equation:

x(2)=9/100

We move all terms to the left:

x(2)-(9/100)=0

We add all the numbers together, and all the variables

x2-(+9/100)=0

We add all the numbers together, and all the variables

x^2-(+9/100)=0

We get rid of parentheses

x^2-9/100=0

We multiply all the terms by the denominator


x^2*100-9=0

Wy multiply elements

100x^2-9=0

a = 100; b = 0; c = -9;
Δ = b2-4ac
Δ = 02-4·100·(-9)
Δ = 3600
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{3600}=60$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-60}{2*100}=\frac{-60}{200}
=-3/10
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+60}{2*100}=\frac{60}{200}
=3/10
$