Practice Evaluation in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
Calculating the value of an expression by substituting specific values for variables.
Plug in the number and compute: if x = 3, then 2x + 1 = 2(3) + 1 = 7.
Example 1
easyEvaluate 5x - 3 when x = 4.
Example 2
mediumEvaluate \frac{a^2 - b^2}{a + b} when a = 5 and b = 3.
Example 3
easyEvaluate -2x + 10 when x = -3.
Example 4
hardIf f(x) = x^3 - 2x, find f(-2).