(m+2)(2m-3)=0

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(m+2)(2m-3)=0(m+2)(2m-3)=0(m+2)(2m-3)=0-2或3/2

(m+2)(2m-3)=0
(m+2)(2m-3)=0

(m+2)(2m-3)=0
-2或3/2