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shy_sweetie94 · Aug 7, 2007, 06:37 PM

hellooo!!

I need help with this question so pleeeeease help! :confused:

factor 2x^3-1

^ means to raise the power... ;)

thanks again!!

galactus · Aug 7, 2007, 06:53 PM

Use the difference of two cubes:

$a^{3}-b^{3}=(a-b)(a^{2}+ab+b^{2})$

$(2^{\frac{1}{3}}x)^{3}-(1)^{3}$

$a=2^{\frac{1}{3}}x, \;\ b=1$

$(2^{\frac{1}{3}}x-1)(2^{\frac{2}{3}}x^{2}+2^{\frac{1}{3}}x+1)$

See how that was done?

shy_sweetie94 · Aug 8, 2007, 12:56 PM

Yes... thank you!!

floridaschool · Jan 28, 2008, 12:24 PM

I need help tooo

Dancer1991 · Apr 14, 2008, 04:25 PM

hay hlepp solve by factoring 3x^+21=0 ^=squared