# 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
2 years, 11 months ago

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Staff - 2 years, 11 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! :)

- 2 years, 11 months ago