Answer:
a= 3
b= -18
Step-by-step explanation:
In order to subtract fractions, you must have a common denominator. Adding variables makes it no different.
To have a common denominator multiply both denominators by the other one.
(x-2)(x+2)=x^2-4
Whatever you do the bottom you do to the top
2(x-2)(x+2) - x+1(x+2) - x-4(x-2)
Solve
2x^2-8 - x^2-3x-2 - x^2+6x-8
Combine like terms
3x-18
Now include the common denominator to get
3x-18/x^2-4
a and b correspond to this answer
