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Best Answer

6n² - 18n - 18 = 6, so 6n² - 18n - 24 = 0.

Dividing by 6:

n² - 3n - 4 = 0.

What multiplies to -4 and adds to -3? The only possible factors are:

(-1)4

(-2)2

(-4)1

...with sums of 3, 0, and -3, respectively. We want that last one, so

n² - 3n - 4 = (n - 4)(n + 1).

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āˆ™ 14y ago
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āˆ™ 14y ago

-2n(n-9) = 0

n = 0 or n = 9

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āˆ™ 12y ago

(n + 2)(2n-9)

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āˆ™ 11y ago

(n + 9)(2n - 9)

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