Evaluating an expression with one variable ex 9, ((z - 1)^2 + z) / (z + 1); z = -7

The video tutorial guides viewers through solving a math problem involving three variables and a quotient. The instructor demonstrates how to substitute a given value for a variable, apply the order of operations to simplify the expression, and perform calculations to arrive at the final simplified answer. The process includes careful attention to parentheses and arithmetic operations, ultimately leading to a reduced fraction as the solution.

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