x^2-16x+63/(x-7)(x-7)

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Solution for x^2-16x+63/(x-7)(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)

(63/(x-7))*(x-7)+x^2-(16*x) = 0

(63/(x-7))*(x-7)+x^2-16*x = 0

x^2-16*x+63 = 0

x^2-16*x+63 = 0

x^2-16*x+63 = 0

DELTA = (-16)^2-(1*4*63)

DELTA = 4

DELTA > 0

x = (4^(1/2)+16)/(1*2) or x = (16-4^(1/2))/(1*2)

x = 9 or x = 7

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

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

( x-7 )

x-7 = 0 // + 7

x = 7

( x-9 )

x-9 = 0 // + 9

x = 9

x in { 7} 

x = 9

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