1.44z^2-1.36=-0.64

Solution for 1.44z^2-1.36=-0.64 equation:

1.44z^2-1.36=-0.64

We move all terms to the left:

1.44z^2-1.36-(-0.64)=0

We add all the numbers together, and all the variables

1.44z^2-0.72=0

a = 1.44; b = 0; c = -0.72;
Δ = b2-4ac
Δ = 02-4·1.44·(-0.72)
Δ = 4.1472
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$z_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$z_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$z_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{4.1472}}{2*1.44}=\frac{0-\sqrt{4.1472}}{2.88}
=-\frac{\sqrt{}}{2.88}
$
$z_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{4.1472}}{2*1.44}=\frac{0+\sqrt{4.1472}}{2.88}
=\frac{\sqrt{}}{2.88}
$