x^2-1.2x=1.44

Solution for x^2-1.2x=1.44 equation:

x^2-1.2x=1.44

We move all terms to the left:

x^2-1.2x-(1.44)=0

We add all the numbers together, and all the variables

x^2-1.2x-1.44=0

a = 1; b = -1.2; c = -1.44;
Δ = b2-4ac
Δ = -1.22-4·1·(-1.44)
Δ = 7.2
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{-(-1.2)-\sqrt{7.2}}{2*1}=\frac{1.2-\sqrt{7.2}}{2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1.2)+\sqrt{7.2}}{2*1}=\frac{1.2+\sqrt{7.2}}{2}
$