(2x^2-6x-8)/(x+1)

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Solution for (2x^2-6x-8)/(x+1) equation: 


D( x )

x+1 = 0

x+1 = 0

x+1 = 0

x+1 = 0 // - 1

x = -1

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

(2*x^2-(6*x)-8)/(x+1) = 0

(2*x^2-6*x-8)/(x+1) = 0

2*x^2-6*x-8 = 0

2*(x^2-3*x-4) = 0

x^2-3*x-4 = 0

DELTA = (-3)^2-(-4*1*4)

DELTA = 25

DELTA > 0

x = (25^(1/2)+3)/(1*2) or x = (3-25^(1/2))/(1*2)

x = 4 or x = -1

2*(x+1)*(x-4) = 0

2*(x-4) = 0

x-4 = 0 // + 4

x = 4

x = 4

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