hi,

i need to work out this fraction:

3/2x-1 - 4/3x-1

i can do the first part and worked it out and you get a quadratic equation as shown in my picture:

Attachment 20861

when i type in to my calculator 36-4x6x6 it =-108?

-108 doesn't work!!! why is it coming up with this? have i started my quadratic equation wrong?

help would be much appreciated!!!!

thanks!