1/4x+1/2x=16

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Solution for 1/4x+1/2x=16 equation:



1/4x+1/2x=16
We move all terms to the left:
1/4x+1/2x-(16)=0
Domain of the equation: 4x!=0
x!=0/4
x!=0
x∈R
Domain of the equation: 2x!=0
x!=0/2
x!=0
x∈R
We calculate fractions
2x/8x^2+4x/8x^2-16=0
We multiply all the terms by the denominator
2x+4x-16*8x^2=0
We add all the numbers together, and all the variables
6x-16*8x^2=0
Wy multiply elements
-128x^2+6x=0
a = -128; b = 6; c = 0;
Δ = b2-4ac
Δ = 62-4·(-128)·0
Δ = 36
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{36}=6$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(6)-6}{2*-128}=\frac{-12}{-256} =3/64 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6)+6}{2*-128}=\frac{0}{-256} =0 $

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