3x*4x=21,6

Solution for 3x*4x=21,6 equation:

3x*4x=21.6

We move all terms to the left:

3x*4x-(21.6)=0

We add all the numbers together, and all the variables

3x*4x-21.6=0

Wy multiply elements

12x^2-21.6=0

a = 12; b = 0; c = -21.6;
Δ = b2-4ac
Δ = 02-4·12·(-21.6)
Δ = 1036.8
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{1036.8}}{2*12}=\frac{0-\sqrt{1036.8}}{24}
=-\frac{\sqrt{}}{24}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{1036.8}}{2*12}=\frac{0+\sqrt{1036.8}}{24}
=\frac{\sqrt{}}{24}
$