Originally Posted by

**Cait** For college beginning algebra.

~Please explain every step because I'm mathmatically stupid~

Problem:

5k^3+40

The answer is SUPPOSIDLY 5(K+2)(K^2-2K+4)

but i dont see how they get it.

Here's the example they put in the book for this type of problem.

Factor:

64x^3 + 1

Solution:

(4x)^3 + 1^3

=

(4x+1)[(4x)^2-(4x)(1)+1^2]

=

(4x+1)(16x^2-4x+1)

and so from what im takin it is..

if you have

5k^3+40

Then first step is.. you gotta make the 40 into a cubed like the 5k^3..

but.. as far as i know, NOTHING cubed is 40. I had my dad look at this too and he has no idea what to do.. and neither do i.

Thanks

~Cait