(2x^2-23x+63)/(x-7)

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Solution for (2x^2-23x+63)/(x-7) equation: 


D( x )

x-7 = 0

x-7 = 0

x-7 = 0

x-7 = 0 // + 7

x = 7

x in (-oo:7) U (7:+oo)

(2*x^2-(23*x)+63)/(x-7) = 0

(2*x^2-23*x+63)/(x-7) = 0

2*x^2-23*x+63 = 0

2*x^2-23*x+63 = 0

DELTA = (-23)^2-(2*4*63)

DELTA = 25

DELTA > 0

x = (25^(1/2)+23)/(2*2) or x = (23-25^(1/2))/(2*2)

x = 7 or x = 9/2

(x-9/2)*(x-7) = 0

x-9/2 = 0

x-9/2 = 0 // + 9/2

x = 9/2

x = 9/2

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