72/5x=x

Solution for 72/5x=x equation:

72/5x=x

We move all terms to the left:

72/5x-(x)=0


Domain of the equation: 5x!=0

x!=0/5

x!=0

x∈R


We add all the numbers together, and all the variables

-1x+72/5x=0

We multiply all the terms by the denominator


-1x*5x+72=0

Wy multiply elements

-5x^2+72=0

a = -5; b = 0; c = +72;
Δ = b2-4ac
Δ = 02-4·(-5)·72
Δ = 1440
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:

$\sqrt{\Delta}=\sqrt{1440}=\sqrt{144*10}=\sqrt{144}*\sqrt{10}=12\sqrt{10}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-12\sqrt{10}}{2*-5}=\frac{0-12\sqrt{10}}{-10}
=-\frac{12\sqrt{10}}{-10}
=-\frac{6\sqrt{10}}{-5}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+12\sqrt{10}}{2*-5}=\frac{0+12\sqrt{10}}{-10}
=\frac{12\sqrt{10}}{-10}
=\frac{6\sqrt{10}}{-5}
$