Evaluate an expression with two variables ex 7, ((3b)^2 + b) / c; b = 4; c = 8

The video tutorial explains how to evaluate an algebraic expression by substituting given values for variables. It covers the process of replacing variables with their values, applying the order of operations, and simplifying the expression step-by-step. The tutorial concludes with the final calculation and a reduced answer, emphasizing the importance of understanding square numbers and division.

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