i feel dumb for gettin stuck on this..please solve..dont even know where to start..
2007-08-27 05:50:28 · 4 answers · asked by arod_69 1 in Science & Mathematics ➔ Mathematics
im sorry guys i forgot to write that it asks to factor out a+6
2007-08-27 06:06:48 · update #1
Which way are you supposed to go? The easiest way to write that is just:
(a+6)^3
If you are supposed to expand it out, it's:
a^3 + 3(6)a^2 + 3(6^2)a + 6^3.
2007-08-27 05:55:49 · answer #1 · answered by Anonymous · 0⤊ 0⤋
b * b^2 = b^3
plug b=a+6 into it, and get:
(a + 6)(a + 6)^2 = (a + 6)^3
2007-08-27 12:55:19 · answer #2 · answered by Amit Y 5 · 0⤊ 0⤋
(a+6)(a+6)^2
= (a + 6)^3
= a^3 + 3a^2(6) + 3a(6^2) + 6^3
= a^3 + 18a^2 + 72a + 216
2007-08-27 12:55:49 · answer #3 · answered by vlee1225 6 · 0⤊ 0⤋
(a+b)(a+b)^2
=(a+b)(a^2+b^2+2ab)
=a(a^2+b^2+2ab)+b(a^2+b^2+2ab)
a^3+ab^2+2a^2b+a^2b+b^3+2ab^2
=a^3+3ab^2+3a^2b+b^3 ans
you can also solve using the formula (a+b)^3
2007-08-27 14:14:03 · answer #4 · answered by MAHAANIM07 4 · 0⤊ 0⤋