x^2-0.36x^2=0.36

Solution for x^2-0.36x^2=0.36 equation:

x^2-0.36x^2=0.36

We move all terms to the left:

x^2-0.36x^2-(0.36)=0

We add all the numbers together, and all the variables

0.64x^2-0.36=0

a = 0.64; b = 0; c = -0.36;
Δ = b2-4ac
Δ = 02-4·0.64·(-0.36)
Δ = 0.9216
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{0.9216}}{2*0.64}=\frac{0-\sqrt{0.9216}}{1.28}
=-\frac{\sqrt{}}{1.28}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{0.9216}}{2*0.64}=\frac{0+\sqrt{0.9216}}{1.28}
=\frac{\sqrt{}}{1.28}
$