## College Algebra (11th Edition)

($m^{2}$ - 3)($r^{2}$ - 5)
1. Group like terms together. ($m^{2}r^{2}$ - 5$m^{2}$) + (-3$r^{2}$ + 15) 2. Factor out GCF from each group. $m^{2}$($r^{2}$ - 5) - 3($r^{2}$ - 5) 3. Use distributive property to factor. ($m^{2}$ - 3)($r^{2}$ - 5)