Mathematics
Junior High
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これの途中式教えて下さい!

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✨ Best Answer ✨

(x-7)²-1=0
x-7を仮にAとおく。
A²-1=0
(A-1)(A+1)=0
(x-7-1)(x-7+1)=0
(x-8)(x-6)=0
x=8、6

はな

ありがとうございます!!

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