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Expression Formation

Add: 3mn, -...

Question

Add: $3 m n, - 5 m n, 8 m n, - 4 m n$

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Solution

Here we need to add $3 m n, - 5 m n, 8 m n, - 4 m n$

$3 m n - 5 m n + 8 m n - 4 m n = (3 - 5 + 8 - 4) m n = 2 m n$

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