How do you factor $18b^3-36b^2-9$ ?

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Answer 1 · 2018-07-02T02:14:19

$color(blue)(=> 9 * (2b^3 - 4b^2 - 1)$

$18b^3 - 36b^2 - 9$

$=> 9 * 2 * b^3 - 9 * 2 * 2 * b^2 - 9$

$=> 9 * (2b^3 - 4b^2 - 1)$

How do you factor 18b^3-36b^2-918b^3-36b^2-9?