30/x=2x

Solution for 30/x=2x equation:

30/x=2x

We move all terms to the left:

30/x-(2x)=0


Domain of the equation: x!=0

x∈R


We add all the numbers together, and all the variables

-2x+30/x=0

We multiply all the terms by the denominator


-2x*x+30=0

Wy multiply elements

-2x^2+30=0

a = -2; b = 0; c = +30;
Δ = b2-4ac
Δ = 02-4·(-2)·30
Δ = 240
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{240}=\sqrt{16*15}=\sqrt{16}*\sqrt{15}=4\sqrt{15}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-4\sqrt{15}}{2*-2}=\frac{0-4\sqrt{15}}{-4}
=-\frac{4\sqrt{15}}{-4}
=-\frac{\sqrt{15}}{-1}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+4\sqrt{15}}{2*-2}=\frac{0+4\sqrt{15}}{-4}
=\frac{4\sqrt{15}}{-4}
=\frac{\sqrt{15}}{-1}
$