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Question

Add the following expressions:
$$I^2 + m^2 + n^2, Im + mn, mn + nI + Im$$


Solution

$$1^2 + m^2 + n^2, 1m + mn, mn + nl, n1 + 1m$$ 
On adding the expressions, we have
= $$1^2 + m^2 + n^2 + 1m + mn + mn + n1 + n1 + 1m$$ 
=$$1^2 + m^2 + n^2 + 21m + 2mn + 2n1$$

Mathematics

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