Evaluating an Expression With One Operation and an Exponent

In this lesson, we learn ways lto evaluate algebraic expressions that involve one operation and an exponent.

Evaluate the algebraic expression 3 + x²; for x = 2

Solution

Step 1:

Plug in the value of x as 2 in the expression.

3 + x² = 3 + (2 × 2) = 3 + 4 = 7

Step 2:

So, for x = 2, 3 + x² = 7

Evaluate the algebraic expression y + 2³; for y = 5

Solution

Step 1:

Plug in the value of y as 5 in the expression.

y + 2³ = 5 + (2 × 2 × 2) = 5 + 8 = 13

Step 2:

So, for y = 5, y + 2³ = 13