Video

Evaluating exponent expressions with variables (Full video)

Khan Academy

Description: Evaluate expressions with exponents and variables. We are asked to evaluate the expression five to the x power minus three to the x power for x equals two. So this expression, for x equals two, would be five to the second power minus three to the second power. Well, five to the second power, that's the same thing as five times five.

You must log inorsign upif you want to:*

*Teacher Advisor is 100% free.