Factor 81x^2-4

Problem

81*x2−4

Solution

1. Identify the expression as a difference of two squares, which follows the pattern a2−b2=(a−b)*(a+b)

2. Determine the square root of the first term, 81*x2 which is 9*x

3. Determine the square root of the second term, 4 which is 2

4. Substitute the values a=9*x and b=2 into the difference of squares formula.

Final Answer

81*x2−4=(9*x−2)*(9*x+2)

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