Recognize Difference of Squares: Step Title: Recognize the Difference of SquaresConcise Step Description: Identify that the expression is a difference of squares, which can be factored into the product of a sum and difference.Step Calculation: Recognize that 81x2 is a perfect square, as is y4, and so is 1. The expression can be written as (9x)2−(1y2)2.Step Output: Expression as a difference of squares: (9x)2−(1y2)2
Apply Squares Formula: Step Title: Apply the Difference of Squares FormulaConcise Step Description: Use the difference of squares formula, which states that a2−b2=(a+b)(a−b), to factor the expression.Step Calculation: Apply the formula with a=9x and b=y2, yielding (9x+y2)(9x−y2).Step Output: Factored form using the difference of squares: (9x+y2)(9x−y2)
Recognize Another Difference of Squares: Step Title: Recognize Another Difference of SquaresConcise Step Description: Identify that one of the factors from the previous step is also a difference of squares.Step Calculation: Recognize that 9x−y2 can be written as (3x)2−(y)2.Step Output: Expression as a difference of squares: (3x)2−(y)2
Factor Second Difference of Squares: Step Title: Factor the Second Difference of SquaresConcise Step Description: Use the difference of squares formula again to factor the expression 9x−y2.Step Calculation: Apply the formula with a=3x and b=y, yielding (3x+y)(3x−y).Step Output: Factored form using the difference of squares: (3x+y)(3x−y)
Write Completely Factored Form: Step Title: Write the Completely Factored FormConcise Step Description: Combine the factored forms from the previous steps to write the completely factored expression.Step Calculation: The completely factored form is (9x+y2)(3x+y)(3x−y).Step Output: Completely factored form: (9x+y2)(3x+y)(3x−y)