,一定给好评TAT
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,一定给好评TAT
,一定给好评TAT
,一定给好评TAT
(6x+5)(6x-5)-(6x-1)(6x-1)=-20
36x^2-25-36x^2+12x-1=-20
12x=-20+25+1
12x=6
x=0.5