1/8*y=4

Solution for 1/8*y=4 equation:

1/8*y=4

We move all terms to the left:

1/8*y-(4)=0


Domain of the equation: 8*y!=0

y!=0/1

y!=0

y∈R


We multiply all the terms by the denominator


-4*8*y+1=0

Wy multiply elements

-32y*y+1=0

Wy multiply elements

-32y^2+1=0

a = -32; b = 0; c = +1;
Δ = b2-4ac
Δ = 02-4·(-32)·1
Δ = 128
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{128}=\sqrt{64*2}=\sqrt{64}*\sqrt{2}=8\sqrt{2}$
$y_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-8\sqrt{2}}{2*-32}=\frac{0-8\sqrt{2}}{-64}
=-\frac{8\sqrt{2}}{-64}
=-\frac{\sqrt{2}}{-8}
$
$y_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+8\sqrt{2}}{2*-32}=\frac{0+8\sqrt{2}}{-64}
=\frac{8\sqrt{2}}{-64}
=\frac{\sqrt{2}}{-8}
$