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32=1/2x+2x+12
We move all terms to the left:
32-(1/2x+2x+12)=0
Domain of the equation: 2x+2x+12)!=0We add all the numbers together, and all the variables
x∈R
-(2x+1/2x+12)+32=0
We get rid of parentheses
-2x-1/2x-12+32=0
We multiply all the terms by the denominator
-2x*2x-12*2x+32*2x-1=0
Wy multiply elements
-4x^2-24x+64x-1=0
We add all the numbers together, and all the variables
-4x^2+40x-1=0
a = -4; b = 40; c = -1;
Δ = b2-4ac
Δ = 402-4·(-4)·(-1)
Δ = 1584
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{1584}=\sqrt{144*11}=\sqrt{144}*\sqrt{11}=12\sqrt{11}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(40)-12\sqrt{11}}{2*-4}=\frac{-40-12\sqrt{11}}{-8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(40)+12\sqrt{11}}{2*-4}=\frac{-40+12\sqrt{11}}{-8} $
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