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X-1/X-2=3
We move all terms to the left:
X-1/X-2-(3)=0
Domain of the equation: X!=0We add all the numbers together, and all the variables
X∈R
X-1/X-5=0
We multiply all the terms by the denominator
X*X-5*X-1=0
We add all the numbers together, and all the variables
-5X+X*X-1=0
Wy multiply elements
X^2-5X-1=0
a = 1; b = -5; c = -1;
Δ = b2-4ac
Δ = -52-4·1·(-1)
Δ = 29
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}$$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-5)-\sqrt{29}}{2*1}=\frac{5-\sqrt{29}}{2} $$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-5)+\sqrt{29}}{2*1}=\frac{5+\sqrt{29}}{2} $
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