The process of replacing the variables in an expression with the numerical values and simplifying it is known as evaluating an algebraic expression.
Order of operation is used to evaluate an algebraic expression.
Example of Evaluate an Algebraic Expression
To evaluate the algebraic expression '4.5 + x' for x = 3.2, we need to replace x with 3.2 and then add.
4.5 + x = 4.5 + 3.2
=7.7
Solved Example on Evaluate an Algebraic Expression
Ques: Evaluate the algebraic expression p + 3q + 2p - 3q, for p = 2 and q = - 5.
Choices:
A. 12
B. 18
C. 3
D. 6
Correct Answer: D