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If a=b, a-b=0, therefore, we cannot cancel out (a-b) from (a-b)(a+b)=b(a-b)Isnt it the irony?
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If a=b, a-b=0, therefore, we cannot cancel out (a-b) from (a-b)(a+b)=b(a-b)
Isnt it the irony?
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