(2x^2+17x-9)/(x+9)

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Solution for (2x^2+17x-9)/(x+9) equation: 


D( x )

x+9 = 0

x+9 = 0

x+9 = 0

x+9 = 0 // - 9

x = -9

x in (-oo:-9) U (-9:+oo)

(2*x^2+17*x-9)/(x+9) = 0

2*x^2+17*x-9 = 0

2*x^2+17*x-9 = 0

DELTA = 17^2-(-9*2*4)

DELTA = 361

DELTA > 0

x = (361^(1/2)-17)/(2*2) or x = (-361^(1/2)-17)/(2*2)

x = 1/2 or x = -9

(x+9)*(x-1/2) = 0

x-1/2 = 0

x-1/2 = 0 // + 1/2

x = 1/2

x = 1/2

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