0=x2-3x+0.5

Solution for 0=x2-3x+0.5 equation:

0=x2-3x+0.5

We move all terms to the left:

0-(x2-3x+0.5)=0

We add all the numbers together, and all the variables

-(+x^2-3x+0.5)+0=0

We add all the numbers together, and all the variables

-(+x^2-3x+0.5)=0

We get rid of parentheses

-x^2+3x-0.5=0

We add all the numbers together, and all the variables

-1x^2+3x-0.5=0

a = -1; b = 3; c = -0.5;
Δ = b2-4ac
Δ = 32-4·(-1)·(-0.5)
Δ = 7
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{-(3)-\sqrt{7}}{2*-1}=\frac{-3-\sqrt{7}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+\sqrt{7}}{2*-1}=\frac{-3+\sqrt{7}}{-2}
$