1/(x2-8x+15)

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Solution for 1/(x2-8x+15) equation: 


D( x )

x^2-(8*x)+15 = 0

x^2-(8*x)+15 = 0

x^2-(8*x)+15 = 0

x^2-8*x+15 = 0

x^2-8*x+15 = 0

DELTA = (-8)^2-(1*4*15)

DELTA = 4

DELTA > 0

x = (4^(1/2)+8)/(1*2) or x = (8-4^(1/2))/(1*2)

x = 5 or x = 3

x in (-oo:3) U (3:5) U (5:+oo)

1/(x^2-(8*x)+15) = 0

1/(x^2-8*x+15) = 0

x^2-8*x+15 = 0

x^2-8*x+15 = 0

DELTA = (-8)^2-(1*4*15)

DELTA = 4

DELTA > 0

x = (4^(1/2)+8)/(1*2) or x = (8-4^(1/2))/(1*2)

x = 5 or x = 3

(x-3)*(x-5) = 0

1/((x-3)*(x-5)) = 0

x belongs to the empty set

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