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

Appendix A - Ex. Set : 59 (Answer) $ab – 6a + 7b - 42$ $= (b – 6)(a + 7)$
Appendix A - Ex. Set : 59 (Solution) $ab – 6a + 7b - 42$ $= a(b - 6) + 7(b – 6)$ (Factoring out the factors) $= (b – 6)(a + 7)$ (Factoring out the greatest common factor (GCF))