1/2z-1/4z=2-5

Solution for 1/2z-1/4z=2-5 equation:

1/2z-1/4z=2-5

We move all terms to the left:

1/2z-1/4z-(2-5)=0


Domain of the equation: 2z!=0

z!=0/2

z!=0

z∈R



Domain of the equation: 4z!=0

z!=0/4

z!=0

z∈R


We add all the numbers together, and all the variables

1/2z-1/4z-(-3)=0

We add all the numbers together, and all the variables

1/2z-1/4z+3=0

We calculate fractions


4z/8z^2+(-2z)/8z^2+3=0

We multiply all the terms by the denominator


4z+(-2z)+3*8z^2=0

Wy multiply elements

24z^2+4z+(-2z)=0

We get rid of parentheses

24z^2+4z-2z=0

We add all the numbers together, and all the variables

24z^2+2z=0

a = 24; b = 2; c = 0;
Δ = b2-4ac
Δ = 22-4·24·0
Δ = 4
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$z_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$z_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{4}=2$
$z_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2}{2*24}=\frac{-4}{48}
=-1/12
$
$z_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2}{2*24}=\frac{0}{48}
=0
$