So it ask to evaluate tan(A-B)

Given:

TanA: -4/3

TAnB: -√8 (negative radical8)

So far I got

Tan A = Tan A - Tan B / 1+ tan A Tan B

Tan A= -4/3-(-√8/1) divided 1+(-4/3)(-√8/1)

Tan A=-4+3√8/3divided by3+4√8/3

So now I dived both -4+3√8/3 * 3/3+4√8

=-4+3√3/3-4√8

As my final answers