help! math problems! (factoring)?

0 ⤊

please factor out:

(a+b)^3
;
(a-b)^3
;
(a^3 -1)
;
(a^3 +1)

...

pretty please! thanks!

2007-04-23 04:53:16 · 2 answers · asked by helen 1 in Science & Mathematics ➔ Mathematics

The first two are already factored out.

a³ - 1 = (a-1)(a² + a + 1)

a³ + 1 = (a+1)(a² - a + 1)

2007-04-23 04:57:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋

(a+b)^3=a^3+3a^2b+3ab^2+b^3
(a-b)^3=a^3-3a^2b+3ab^2-b^3
(a^3 -1)=(a-1)(a^2+a+1)
(a^3 +1)=(a+1)(a^2-a+1)

2007-04-23 05:06:48 · answer #2 · answered by iyiogrenci 6 · 0⤊ 0⤋