Identify Expression Type: Step Title: Identify the Type of ExpressionConcise Step Description: Recognize that the expression is a difference of two powers.Step Calculation: The expression is r9−z9, which is a difference of two ninth powers.
Apply Squares Formula: Step Title: Apply the Difference of Two Squares FormulaConcise Step Description: Use the difference of two squares formula, a2−b2=(a+b)(a−b), to factor the expression.Step Calculation: The expression can be written as (r29)2−(z29)2, which is a difference of squares.
Factor Using Cubes Formulas: Step Title: Factor Using the Sum and Difference of Cubes FormulasConcise Step Description: Recognize that the expression can be further factored using the sum and difference of cubes formulas, a3−b3=(a−b)(a2+ab+b2) and a3+b3=(a+b)(a2−ab+b2).Step Calculation: The expression (r(9/2))2−(z(9/2))2 can be factored as (r(9/2)−z(9/2))(r(9/2)+z(9/2)).
Recognize Difference of Cubes: Step Title: Recognize the Difference of CubesConcise Step Description: Notice that r9/2−z9/2 is a difference of cubes, as (r3)3−(z3)3.Step Calculation: Factor r9/2−z9/2 using the difference of cubes formula to get (r3−z3)(r6+r3z3+z6).
Factor Cubes Completely: Step Title: Factor the Difference of Cubes CompletelyConcise Step Description: Factor r3−z3 completely using the difference of cubes formula.Step Calculation: Factor r3−z3 to get (r−z)(r2+rz+z2).
Combine All Factors: Step Title: Combine All FactorsConcise Step Description: Combine all the factors obtained from the previous steps to write the final factored form of the original expression.Step Calculation: The final factored form is (r−z)(r2+rz+z2)(r3+z3)(r3−z3).