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Mathematics 20 Online
OpenStudy (anonymous):

Explain, in complete sentences, how you would completely factor 3x3 + 27x2y – 24xy – 216y2 by using the grouping method. How would you check your factors for accuracy?

OpenStudy (zzr0ck3r):

is this 3x^3?

OpenStudy (anonymous):

yes, srry.

OpenStudy (zzr0ck3r):

3x^3 + 27x^2y - 24xy-216y^2 3x^2(x+9y) - 24y(x+9y) = (3x^2-24y)(x+9y)

OpenStudy (anonymous):

Thanks ;)

OpenStudy (anonymous):

can you tell me what the GCF is?

OpenStudy (zzr0ck3r):

it cant be higher than 3 because the first term has 3 and they dont all share a x or a y so since 3 devides coeficients then I guess 3

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