a*2a=65,4

Solution for a*2a=65,4 equation:

a*2a=65.4

We move all terms to the left:

a*2a-(65.4)=0

We add all the numbers together, and all the variables

a*2a-65.4=0

Wy multiply elements

2a^2-65.4=0

a = 2; b = 0; c = -65.4;
Δ = b2-4ac
Δ = 02-4·2·(-65.4)
Δ = 523.2
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{523.2}}{2*2}=\frac{0-\sqrt{523.2}}{4}
=-\frac{\sqrt{}}{4}
$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{523.2}}{2*2}=\frac{0+\sqrt{523.2}}{4}
=\frac{\sqrt{}}{4}
$