The potential energy for a certain mass moving in one dimension is given by U(x)=(2.0J/m3)x3β(15J/m2)x2+(36J/m) xβ23JU(x)=(2.0J/m3)x3β(15J/m2)x2+(3 6J/m)xβ23JU(x) = (2.0 {\rm J/m}^{3})x^{3}- (15 {\rm J/m}^{2})x^{2}+ (36 {\rm J/m})x - 23 {\rm J}. Find the location(s) where the force on the mass is zero.
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