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2x-16=16/x-20
We move all terms to the left:
2x-16-(16/x-20)=0
Domain of the equation: x-20)!=0We get rid of parentheses
x∈R
2x-16/x+20-16=0
We multiply all the terms by the denominator
2x*x+20*x-16*x-16=0
We add all the numbers together, and all the variables
4x+2x*x-16=0
Wy multiply elements
2x^2+4x-16=0
a = 2; b = 4; c = -16;
Δ = b2-4ac
Δ = 42-4·2·(-16)
Δ = 144
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{144}=12$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-12}{2*2}=\frac{-16}{4} =-4 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+12}{2*2}=\frac{8}{4} =2 $
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