Factor -s^3+3s^2+9s-27

Factor out the greatest common factor from each group.
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Group the first two terms and the last two terms.
Factor out the greatest common factor (GCF) from each group.
Factor the polynomial by factoring out the greatest common factor, .
Rewrite as .
Factor.
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Since both terms are perfect squares, factor using the difference of squares formula, where and .
Remove unnecessary parentheses.
Combine exponents.
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Factor out of .
Rewrite as .
Factor out of .
Rewrite as .
Raise to the power of .
Raise to the power of .
Use the power rule to combine exponents.
Add and .