Answer
($m^{2}$ - 3)($r^{2}$ - 5)
Work Step by Step
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)
