(x^2-13x-48)/(x+3)

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Solution for (x^2-13x-48)/(x+3) equation: 


D( x )

x+3 = 0

x+3 = 0

x+3 = 0

x+3 = 0 // - 3

x = -3

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

(x^2-(13*x)-48)/(x+3) = 0

(x^2-13*x-48)/(x+3) = 0

x^2-13*x-48 = 0

x^2-13*x-48 = 0

DELTA = (-13)^2-(-48*1*4)

DELTA = 361

DELTA > 0

x = (361^(1/2)+13)/(1*2) or x = (13-361^(1/2))/(1*2)

x = 16 or x = -3

(x+3)*(x-16) = 0

x-16 = 0

x-16 = 0 // + 16

x = 16

x = 16

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