Evaluate: (105)^2-(104)^2 - Vidyadip

Question

Evaluate:
$(105)^2-(104)^2$

✓

Answer

We have,

$(n+1)^2-n^2=(n+1)+n$

Taking $n=104$ and $(n+1)=105$

We get,

$(105)^2-(104)^2=(105+104)=209$

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