Evaluating exponent expressions with variables (Full video)

Khan Academy
Supporting grades: 6

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.

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