(X^2-x-20)/(2x-10)

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Solution for (X^2-x-20)/(2x-10) equation: 


D( x )

2*x-10 = 0

2*x-10 = 0

2*x-10 = 0

2*x-10 = 0 // + 10

2*x = 10 // : 2

x = 10/2

x = 5

x in (-oo:5) U (5:+oo)

(X^2-x-20)/(2*x-10) = 0

X^2-x-20 = 0 // - X^2-20

-x = -(X^2-20) // * -1

x = X^2-20

x = X^2-20

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