Quadratics and Cubics, SMB-033 Solve the equation `12a^2+8a-15=0` for `a.` (2 marks) Show Answers Only `x=5/6 \ text{or}\ -3/2` Show Worked Solution `12a^2+8a-15` `=0` `(6a-5)(2a+3)` `=0` `6a-5` `=0` `text{or}\ \ \ \ a=-3/2` `a` `=5/6`