9(2m+3)²-4(2m-5)²=0

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9(2m+3)²-4(2m-5)²=09(2m+3)²-4(2m-5)²=09(2m+3)²-4(2m-5)²=09(2m+3)²

9(2m+3)²-4(2m-5)²=0
9(2m+3)²-4(2m-5)²=0

9(2m+3)²-4(2m-5)²=0
9(2m+3)²-4(2m-5)²=0
(6m+9)^2-(4m-10)^2=0
(6m+9+4m-10)(6m+9-4m+10)=0
(10m-1)(2m+19)=0
m=1/10或m=-19/2