The equation $\displaystyle {x}^{{2}}+{9}{x}-{12}={0}$ has two solutions $\displaystyle {A}$ and $\displaystyle {B}$ where $\displaystyle {A}<{B}$
and $\displaystyle {A}=$ Preview Question 6 Part 1 of 2   and $\displaystyle {B}=$ Preview Question 6 Part 2 of 2  

Give your answers to 3 decimal places, or as exact expressions.