9(2x+3)²-4(3x-5)²=0
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9(2x+3)²-4(3x-5)²=0
9(2x+3)²-4(3x-5)²=0
9(2x+3)²-4(3x-5)²=0
原式可化为
l6x+9l=l6x-10l
6x+9=-6x+10
12x=1
x=1/12
或6x+9=6x-10 无解 不符合