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31/2x-16=4x
We move all terms to the left:
31/2x-16-(4x)=0
Domain of the equation: 2x!=0We add all the numbers together, and all the variables
x!=0/2
x!=0
x∈R
-4x+31/2x-16=0
We multiply all the terms by the denominator
-4x*2x-16*2x+31=0
Wy multiply elements
-8x^2-32x+31=0
a = -8; b = -32; c = +31;
Δ = b2-4ac
Δ = -322-4·(-8)·31
Δ = 2016
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{2016}=\sqrt{144*14}=\sqrt{144}*\sqrt{14}=12\sqrt{14}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-32)-12\sqrt{14}}{2*-8}=\frac{32-12\sqrt{14}}{-16} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-32)+12\sqrt{14}}{2*-8}=\frac{32+12\sqrt{14}}{-16} $
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