<em>By “simplifying” an algebraic expression, we mean writing it in the most compact or efficient manner, without changing the value of the expression.</em>
Here we are asked to simplify the expression:
4a-2b
We know that both the terms in the expression i.e. 4a and 2b are separated by a negative sign and both have 2 as a common multiple so we will take out common 2 from both the expression i.e. we write our expression as: