(x+2)(63/x-2)=63

Solution for (x+2)(63/x-2)=63 equation:

D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

(x+2)*(63/x-2) = 63 // - 63

(x+2)*(63/x-2)-63 = 0

(x+2)*(63*x^-1-2)-63 = 0

(x+2)*(63*x^-1-2)-63 = 0

126*x^-1-2*x-4 = 0

126*x^-1-2*x-4 = 0

2*(63*x^-1-x-2) = 0

63*x^-1-1*x^1-2*x^0 = 0

(63*x^0-1*x^2-2*x^1)/(x^1) = 0 // * x^2

x^1*(63*x^0-1*x^2-2*x^1) = 0

x^1

63-x^2-2*x = 0

63-x^2-2*x = 0

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

DELTA = 256

DELTA > 0

x = (256^(1/2)+2)/(-1*2) or x = (2-256^(1/2))/(-1*2)

x = -9 or x = 7

x in { -9, 7} 

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

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

( x+9 )

x+9 = 0 // - 9

x = -9

( x-7 )

x-7 = 0 // + 7

x = 7

x in { -9, 7 }