(x^2-4x-12)/(x+2)

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Solution for (x^2-4x-12)/(x+2) equation: 


D( x )

x+2 = 0

x+2 = 0

x+2 = 0

x+2 = 0 // - 2

x = -2

x in (-oo:-2) U (-2:+oo)

(x^2-(4*x)-12)/(x+2) = 0

(x^2-4*x-12)/(x+2) = 0

x^2-4*x-12 = 0

x^2-4*x-12 = 0

DELTA = (-4)^2-(-12*1*4)

DELTA = 64

DELTA > 0

x = (64^(1/2)+4)/(1*2) or x = (4-64^(1/2))/(1*2)

x = 6 or x = -2

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

x-6 = 0

x-6 = 0 // + 6

x = 6

x = 6

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