Simplify (x^2-81)/(x^2-3x-54)*(x+6)/x

Math
Simplify the numerator.
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Rewrite as .
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Factor using the AC method.
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Consider the form . Find a pair of integers whose product is and whose sum is . In this case, whose product is and whose sum is .
Write the factored form using these integers.
Simplify terms.
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Cancel the common factor of .
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Factor out of .
Cancel the common factor.
Rewrite the expression.
Multiply and .
Cancel the common factor of .
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Cancel the common factor.
Rewrite the expression.
Simplify (x^2-81)/(x^2-3x-54)*(x+6)/x

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