(x^2-9)/(x^2-7x+6)

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Solution for (x^2-9)/(x^2-7x+6) equation: 


D( x )

x^2-(7*x)+6 = 0

x^2-(7*x)+6 = 0

x^2-(7*x)+6 = 0

x^2-7*x+6 = 0

x^2-7*x+6 = 0

DELTA = (-7)^2-(1*4*6)

DELTA = 25

DELTA > 0

x = (25^(1/2)+7)/(1*2) or x = (7-25^(1/2))/(1*2)

x = 6 or x = 1

x in (-oo:1) U (1:6) U (6:+oo)

(x^2-9)/(x^2-(7*x)+6) = 0

(x^2-9)/(x^2-7*x+6) = 0

x^2-7*x+6 = 0

x^2-7*x+6 = 0

DELTA = (-7)^2-(1*4*6)

DELTA = 25

DELTA > 0

x = (25^(1/2)+7)/(1*2) or x = (7-25^(1/2))/(1*2)

x = 6 or x = 1

(x-1)*(x-6) = 0

(x^2-9)/((x-1)*(x-6)) = 0

1*x^2 = 9 // : 1

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

x in { 3, -3 }

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