1+(5/х2-х-6)=-(1/х+2)

Question

1+(5/х2-х-6)=-(1/х+2)

Answer 1

1+(5/х2-х-6)=-(1/х+2)

1+5/х^2-х-6=-1/х^2-2

 

х^2+5-х^3-6x^2=-1-2х^2

x^2+5-x^3-6x^2+1+2x^2=0

-x^3-3x^2+6=0

-x^3-3x^2=-6

x^3+3x^2=6

x^2(x+3)=6

x^2=6                             или        x+3=6

x=-+                       x=9