Question 580941
{{{2z^2 + 3z = 135}}}
{{{2z^2 + 3z - 135 = 0}}}
(z + 9)*(2z - 15) = 0
------
Either z+9 = 0 --> z = -9
Or 2z - 15 = 0 --> z = 15/2
--------
You can use the quadratic eqn, too.  Does she know that?