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# Can you prove from RHS = LHS especially in a HSC exam?

Hi guys just wondering, if you don't know how to prove from LHS = RHS, can you go the other way around?

Especially when LHS is in a shortened expression and i can't seem to expand it to make it equal to RHS. But i can do RHS = LHS?

Will i be penalised in a HSC exam for maths?

Please answer. Thank you :)

### 3 Answers

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- grunfeldLv 77 years agoFavorite Answer
why should one be penalized if you showing the two sides are equal ? Typically we start with the more complicated side and it usually is on left.

Source(s): my brain - Let'squestionLv 77 years ago
Yes you can do that you will not be penalized. In exam only equality needs to be proved.

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