(2x-8)/(x2-2x-15)

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Solution for (2x-8)/(x2-2x-15) equation:


D( x )

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

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

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

x^2-2*x-15 = 0

x^2-2*x-15 = 0

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

DELTA = 64

DELTA > 0

x = (64^(1/2)+2)/(1*2) or x = (2-64^(1/2))/(1*2)

x = 5 or x = -3

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

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

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

x^2-2*x-15 = 0

x^2-2*x-15 = 0

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

DELTA = 64

DELTA > 0

x = (64^(1/2)+2)/(1*2) or x = (2-64^(1/2))/(1*2)

x = 5 or x = -3

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

(2*x-8)/((x+3)*(x-5)) = 0

2*x-8 = 0 // + 8

2*x = 8 // : 2

x = 8/2

x = 4

x = 4

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