(2x-1)²-169=0
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![(2x-1)²-169=0](/uploads/image/z/2463953-41-3.jpg?t=%282x-1%29%26%23178%3B-169%3D0)
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(2x-1)²-169=0
(2x-1)²-169=0
(2x-1)²-169=0
(2x-1)²=169
所以2x-1=13或-13
所以x=7或-6
(2x-1)²-169=0
(2x-1)²-13²=0
(2X-1+13)(2X-1-13)=0
(2X+12)(2X-14)=0
解得X1=-6,X2=7