Identify Factoring Type: Identify the type of factoring needed for the expression 1−81x12. The expression is a difference of squares because it can be written as 12−(9x6)2, which fits the form a2−b2.
Apply Difference of Squares: Apply the difference of squares formula to factor the expression.The difference of squares formula is a2−b2=(a−b)(a+b). Here, a=1 and b=9x6.So, 1−81x12=(1−9x6)(1+9x6).
Check Further Factoring: Check for further factoring possibilities.Both 1−9x6 and 1+9x6 are also differences of squares, since they can be written as 12−(3x3)2 and 12+(3x3)2, respectively.
Factor 1−9x6: Factor 1−9x6 further using the difference of squares formula.1−9x6=(1−3x3)(1+3x3).
Factor 1+9x6: Factor 1+9x6 further using the sum of squares formula.However, the sum of squares formula does not result in real factors for polynomials. Therefore, 1+9x6 cannot be factored further over the real numbers.
Combine Factored Parts: Combine all the factored parts to write the final factored form of the original expression.The final factored form of 1−81x12 is (1−3x3)(1+3x3)(1+9x6).
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