3/(x^2-x-2)=(x+43)/(x^2-x-2)-40/(x^2-2x-3)

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Solution for 3/(x^2-x-2)=(x+43)/(x^2-x-2)-40/(x^2-2x-3) equation:


D( x )

x^2-x-2 = 0

x^2-(2*x)-3 = 0

x^2-x-2 = 0

x^2-x-2 = 0

x^2-x-2 = 0

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

DELTA = 9

DELTA > 0

x = (9^(1/2)+1)/(1*2) or x = (1-9^(1/2))/(1*2)

x = 2 or x = -1

x^2-(2*x)-3 = 0

x^2-(2*x)-3 = 0

x^2-2*x-3 = 0

x^2-2*x-3 = 0

DELTA = (-2)^2-(-3*1*4)

DELTA = 16

DELTA > 0

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

x = 3 or x = -1

x in (-oo:-1) U (-1:2) U (2:3) U (3:+oo)

3/(x^2-x-2) = (x+43)/(x^2-x-2)-(40/(x^2-(2*x)-3)) // - (x+43)/(x^2-x-2)-(40/(x^2-(2*x)-3))

3/(x^2-x-2)-((x+43)/(x^2-x-2))+40/(x^2-(2*x)-3) = 0

3/(x^2-x-2)-((x+43)/(x^2-x-2))+40/(x^2-2*x-3) = 0

3/(x^2-x-2)+(-1*(x+43))/(x^2-x-2)+40/(x^2-2*x-3) = 0

x^2-x-2 = 0

x^2-x-2 = 0

x^2-x-2 = 0

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

DELTA = 9

DELTA > 0

x = (9^(1/2)+1)/(1*2) or x = (1-9^(1/2))/(1*2)

x = 2 or x = -1

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

x^2-2*x-3 = 0

x^2-2*x-3 = 0

x^2-2*x-3 = 0

DELTA = (-2)^2-(-3*1*4)

DELTA = 16

DELTA > 0

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

x = 3 or x = -1

(x+1)*(x-3) = 0

3/((x+1)*(x-2))+(-1*(x+43))/((x+1)*(x-2))+40/((x+1)*(x-3)) = 0

3/((x+1)*(x-2))+(-1*(x+43))/((x+1)*(x-2))+(40*(x-2))/((x+1)*(x-2)) = 0

40*(x-2)-1*(x+43)+3 = 0

40*x-x-80-40 = 0

39*x-120 = 0

(39*x-120)/((x+1)*(x-2)) = 0

(39*x-120)/((x+1)*(x-2)) = 0 // * (x+1)*(x-2)

39*x-120 = 0

39*x-120 = 0 // + 120

39*x = 120 // : 39

x = 120/39

x = 40/13

x = 40/13

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