(7x^2-25x-12)/(x-4)

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Solution for (7x^2-25x-12)/(x-4) equation: 


D( x )

x-4 = 0

x-4 = 0

x-4 = 0

x-4 = 0 // + 4

x = 4

x in (-oo:4) U (4:+oo)

(7*x^2-(25*x)-12)/(x-4) = 0

(7*x^2-25*x-12)/(x-4) = 0

7*x^2-25*x-12 = 0

7*x^2-25*x-12 = 0

DELTA = (-25)^2-(-12*4*7)

DELTA = 961

DELTA > 0

x = (961^(1/2)+25)/(2*7) or x = (25-961^(1/2))/(2*7)

x = 4 or x = -3/7

(x+3/7)*(x-4) = 0

x+3/7 = 0

x+3/7 = 0 // - 3/7

x = -3/7

x = -3/7

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