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2m(m+3/2)=-1
2m²+3m+1=0
2m²+2m+m+1=0
2m(m+1)+(m+1)=0
(m+1)(2m+1)=0
m+1=0 v 2m+1=0
m=-1 v m=-1/2
Odp. m∈{-1, -1/2}