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# Why is it wrong?

Let we have to prove that a=b where a & b are integers. Proof: Multiplying LHS & RHS by 0. So, LHS = a * 0 = 0 RHS= b * 0=0 So a=b.

I know its wrong but why?

Note by Shobhit Singh
1 year, 10 months ago

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Please refrain from typing in all capital letters, as that is considered rude on the internet. Staff · 1 year, 10 months ago

From $$a\cdot 0=b\cdot 0$$, you can't get rid of the zero - you would have to divide by zero, which is undefined! :) · 1 year, 10 months ago