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6x-12=208/x
We move all terms to the left:
6x-12-(208/x)=0
Domain of the equation: x)!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
6x-(+208/x)-12=0
We get rid of parentheses
6x-208/x-12=0
We multiply all the terms by the denominator
6x*x-12*x-208=0
We add all the numbers together, and all the variables
-12x+6x*x-208=0
Wy multiply elements
6x^2-12x-208=0
a = 6; b = -12; c = -208;
Δ = b2-4ac
Δ = -122-4·6·(-208)
Δ = 5136
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{5136}=\sqrt{16*321}=\sqrt{16}*\sqrt{321}=4\sqrt{321}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-12)-4\sqrt{321}}{2*6}=\frac{12-4\sqrt{321}}{12} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-12)+4\sqrt{321}}{2*6}=\frac{12+4\sqrt{321}}{12} $
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