Simplify:
(ii) $4 a + 3 b - 2 a - b$

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Solution

By grouping the terms having the same literals and adding , we get,

$4 a + 3 b - 2 a - b = (4 a - 2 a) + (3 b - b)$
$= a (4 - 2) + (b (3 - 1)$
$= 2 a + 2 b$

Hence, $4 a + 3 b - 2 a - b = 2 a + 2 b$

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