Evaluating Expressions with Exponents

The video tutorial demonstrates how to evaluate the expression y cubed minus y squared when y equals eight. It begins with substituting eight for y, then simplifies the exponents by calculating eight cubed and eight squared. The expression simplifies to 512 minus 64, resulting in 448. The tutorial concludes by verifying the calculation using a calculator to ensure accuracy.

What is the first step in evaluating the expression y cubed minus y squared when y equals eight?

• Performing substitution

• Performing multiplication

• Performing addition

• Performing division

What is the value of eight cubed?

• 64

• 128

• 256

• 512

How many factors of eight are multiplied together to calculate eight squared?

• One

• Three

• Two

• Four

What is the result of subtracting eight squared from eight cubed?

• 512

• 448

• 576

• 64

What is the final value of the expression y cubed minus y squared when y equals eight?

• 512

• 64

• 448

• 256

Which operation is performed after simplifying the exponents in the expression?

• Division

• Addition

• Subtraction

• Multiplication

Why is it important to verify the result using a calculator?

• To confirm the manual calculations are correct

• To find a different result

• To ensure the calculator is working

• To practice using a calculator