## Algebra: A Combined Approach (4th Edition)

$(r+5)(2s-1)$
Step 1: Since the polynomial has 4 terms, we can try to factor this polynomial by grouping. Step 2: $2sr+10s-r-5$ Step 3: $2s(r+5)-1(r+5)$ Step 4: $(r+5)(2s-1)$