Trouvez la faute : a=b
a×a=a×b
a²=ab
a²-b²=ab-b²
(a-b)(a+b)=b(a-b)
a+b=b
a+a=b
2a=a
2×a=a×1
2=1
svp aidez moi
a×a=a×b
a²=ab
a²-b²=ab-b²
(a-b)(a+b)=b(a-b)
a+b=b
a+a=b
2a=a
2×a=a×1
2=1
svp aidez moi
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