Answer
(a) $6x^{5}y$
(b) $6b$
Work Step by Step
(a) $(3x^{2}y)(2x^{3})=3\cdot 2x^{2+3}y=6x^{5}y$
(b) $(2a^{2}b^{-1})(3a^{-2}b^{2})=2\cdot 3a^{2-2}b^{-1+2}=6a^0b=6ab$
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