If -2x^3 is one of a pair of factors of 12x^8, name the other factor?

2008-11-11 9:17 am
If -2x^3 is one of a pair of factors of 12x^8, name the other factor

I'm having a hard time with this question.

Is it asking if -2x^3 + BLANK =12x^8
更新1:

Thanks joel just what i needed :)

回答 (3)

2008-11-11 9:21 am
✔ 最佳答案
No, it's asking TIMES instead of PLUS.

-2x^3 * BLANK =12x^8

So BLANK = 12x^8 / (-2x^3) = -6x^5
2008-11-11 10:31 am
12x^8/(-2x^3)
= (12/-2)(x^8/x^3)
= [-6][x^(8 - 3)]
= -6x^5

∴ the other factor is -6x^5.
2008-11-11 9:32 am
- 6 x^5

CHECK
----------
(- 2) x³ (- 6) x^5 = 12 x^8


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