1/4*x=39

Solution for 1/4*x=39 equation:

1/4*x=39

We move all terms to the left:

1/4*x-(39)=0


Domain of the equation: 4*x!=0

x!=0/1

x!=0

x∈R


We multiply all the terms by the denominator


-39*4*x+1=0

Wy multiply elements

-156x*x+1=0

Wy multiply elements

-156x^2+1=0

a = -156; b = 0; c = +1;
Δ = b2-4ac
Δ = 02-4·(-156)·1
Δ = 624
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:

$\sqrt{\Delta}=\sqrt{624}=\sqrt{16*39}=\sqrt{16}*\sqrt{39}=4\sqrt{39}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-4\sqrt{39}}{2*-156}=\frac{0-4\sqrt{39}}{-312}
=-\frac{4\sqrt{39}}{-312}
=-\frac{\sqrt{39}}{-78}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+4\sqrt{39}}{2*-156}=\frac{0+4\sqrt{39}}{-312}
=\frac{4\sqrt{39}}{-312}
=\frac{\sqrt{39}}{-78}
$