-4m-2m²=2 求m-4m-2m²=2 求m

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-4m-2m²=2 求m-4m-2m²=2 求m

-4m-2m²=2 求m-4m-2m²=2 求m
-4m-2m²=2 求m
-4m-2m²=2 求m

-4m-2m²=2 求m-4m-2m²=2 求m
移项,除2
m²+2m+1=0
(m+1)²=0
m+1=0
m=-1