Perform the Division and Simplify $\frac { 4 x ^ { 2 } - 9 } { x + 3 } \div \frac { 2 x ^ { 2 } + 7 x - 15 } { x ^ { 2 } + 7 x + 12 }$

Perform the division and simplify. $\frac { 4 x ^ { 2 } - 9 } { x + 3 } \div \frac { 2 x ^ { 2 } + 7 x - 15 } { x ^ { 2 } + 7 x + 12 }$