1.3x2=7.9

Solution for 1.3x2=7.9 equation:

1.3x^2=7.9

We move all terms to the left:

1.3x^2-(7.9)=0

We add all the numbers together, and all the variables

1.3x^2-7.9=0

a = 1.3; b = 0; c = -7.9;
Δ = b2-4ac
Δ = 02-4·1.3·(-7.9)
Δ = 41.08
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{41.08}}{2*1.3}=\frac{0-\sqrt{41.08}}{2.6}
=-\frac{\sqrt{}}{2.6}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{41.08}}{2*1.3}=\frac{0+\sqrt{41.08}}{2.6}
=\frac{\sqrt{}}{2.6}
$