[tex]b)\\\\x=-2\\\\ 2x^3+ \frac{3}{2}x- \frac{1}{2}= 2* (-2)^3+ \frac{3}{\not{2}^1} *(-\not{2}^1)- \frac{1}{2}=2*(-8)-3-\frac{1}{2}=-16-3\frac{1}{2}=-19\frac{1}{2}[/tex]
[tex]x=-3\\\\ 2x^3+ \frac{3}{2}x- \frac{1}{2}= 2* (-3)^3+ \frac{3}{2} * (-3)- \frac{1}{2}= 2*(-27)-\frac{9}{2}-\frac{1}{2}=-54-4\frac{1}{2}-\frac{1}{2}=-59[/tex]
