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x+1/x-1=3x/3x+6
We move all terms to the left:
x+1/x-1-(3x/3x+6)=0
Domain of the equation: x!=0
x∈R
Domain of the equation: 3x+6)!=0We get rid of parentheses
x∈R
x+1/x-3x/3x-6-1=0
Fractions to decimals
1/x+x-6-1+1=0
We multiply all the terms by the denominator
x*x-6*x-1*x+1*x+1=0
We add all the numbers together, and all the variables
-6x+x*x+1=0
Wy multiply elements
x^2-6x+1=0
a = 1; b = -6; c = +1;
Δ = b2-4ac
Δ = -62-4·1·1
Δ = 32
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{32}=\sqrt{16*2}=\sqrt{16}*\sqrt{2}=4\sqrt{2}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-6)-4\sqrt{2}}{2*1}=\frac{6-4\sqrt{2}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-6)+4\sqrt{2}}{2*1}=\frac{6+4\sqrt{2}}{2} $
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