How Do I Find the Difference of Cubes of 27x^6 - y^9
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How Do I Find the Difference of Cubes of 27x^6 - y^9

[From: ] [author: ] [Date: 11-09-27] [Hit: ]
-(a-b) (a^2 + ab + b^2) is your dif of cubes formula.Then just input A and B into the formula.Done.-ok lestat,in your problem,hope that helps,......
I don't understand how to do the difference of cubes thing. And please don't direct me to another website such as purplemath, I've tried reading it, yet don't understand. Please help!

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(a-b) (a^2 + ab + b^2) is your dif of cubes formula.

A= 3x^2
B= y^3

(you're taking the 3rd root of both 27x^6 and y^6)

Then just input A and B into the formula.
(3x^2-y^3)(9x^4 + 3x^2y^3 +y^6)

Done.

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ok lestat, any difference of two cubes

a^3 - b^3 = (a - b) (a^2 + ab + b^2)

in your problem, the "a" is the cube root of 27 x^6 which is 3x^2
the "b" is the cube root of y^9 which is y^3

so the factors are (3 x^2 - y^3) (9 x^4 + 3 x^2 y^3 + y^6)

hope that helps, but if you are still confused, hit me up: loyalfriend001@yahoo.com

sam
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keywords: Difference,of,Do,27,How,Find,the,Cubes,How Do I Find the Difference of Cubes of 27x^6 - y^9
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