Assuming all variables are positive, use properties of logarithms to write the expression as a sum or difference of logarithms or multiples of logarithms.
log2 (x^9 y^5 / 8)
options:
1) 9log2 x -5log2 y -log2 8
2) 9log2 x +5log2 y -log2 8
3) (9log2 x)(5log2 y) -log2 8
4) 9log2 x +5log2 y +log2 8