How do you factor 9x2-6xy plus y2-81?

Anonymous

∙ 9y ago

Updated: 10/17/2024

9x2 - 6xy + y2 - 81 = (3x - y)2 - 81 (since the first three terms make a perfect square

= (3x - y - 9)(3x - y + 9) since the expression now is a difference of two squares.

Wiki User

∙ 14y ago

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