Exponents Part 2 - Exponents and Evaluating Expressions

Exponents Part 2 - Exponents and Evaluating Expressions
• Currently 3.0/5 Stars.
5623 views, 2 ratings - 00:09:00
Part of video series Exponents
Taught by YourMathGal

Meets NCTM Standards:

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Shows how to evaluate variable expressions containing exponents,focusing on when you replace a variable base with negative numbers.

• How do you evaluate variable expressions that have exponents?
• How do you evaluate 2x^3 and -4x^2 when x = -3?
• What does 3x^2 + 2xy^2 - 4y^2 equal when x = -2 and y = -5?
• What are the two ways of finding the value of a variable expression?
• Why does order of operations matter when evaluating a variable expression?
This is a slightly more advanced exponent lesson in which variable expressions are evaluated for different values of variables. Negative values of variables are used and parentheses are shown to be very important when evaluating a negative number to an exponent. Several rather complicated examples are evaluated and explained step by step.
• Currently 3.0/5 Stars.
Reviewed by MathVids Staff on July 27, 2009.