I know this is simple but my answer doesn't match the answer in the book. Can you please give a step by step direction in how to get the correct answer. Thank you!
(x + 8)((32 − x^2) − x^2) dx
TO
(256 + 32x − 16x^2 − 2x^3) dx
2007-12-01 18:09:04 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
First simplify the 2nd set of parentheses
(x+8) ((32 - x²) - x²)
=(x+8) (32 - x² - x²)
=(x+8) (32 - 2x²)
Now FOIL
F = 32x
O = -2x³
I = 256
L = -16x²
Put them together we get
256 + 32x -16x² - 2x³
2007-12-01 18:12:42 · answer #1 · answered by Jeƒƒ Lebowski 6 · 2⤊ 1⤋
(x + 8)((32 â x^2) â x^2) dx
(x + 8) (32 –2x^2)dx
(32 x –2x^3 + 256 –16x^2) dx
(256 + 32x – 16 x^2 – 2x^3) dx
2007-12-02 02:26:39 · answer #2 · answered by Carmencita 2 · 0⤊ 1⤋
(x+8)((32-x^2)-x^2)dx
=(x+8)(32 -x^2 -x^2)dx
=(x+8)(32 -2x^2)dx
=(x(32-2x^2)+8(32 -2x^2))
=(32x-2^3+256-16x^2)dx
=(256 + 32x â 16x^2 â 2x^3) dx
2007-12-02 02:18:20 · answer #3 · answered by dita n 1 · 0⤊ 0⤋
(x+8)((32 - x^2) - x^2)
= (x + 8) (32 - 2x^2)
= 32x + 8(32) - (x) (2x^2) - 8(2x^2)
= 32x + 256 - 2x^3 - 16x^3
2007-12-02 02:14:49 · answer #4 · answered by blairemrgn 2 · 1⤊ 0⤋
[ (x + 8) (32 - 2 x ²) ] dx
[ 32 x - 2 x³ + 256 - 16 x ² ] dx
[ 256 + 32 x - 16 x ² - 2 x ³ ] dx
2007-12-03 11:27:33 · answer #5 · answered by Como 7 · 1⤊ 1⤋
use the foil method then simplify
2007-12-02 02:13:40 · answer #6 · answered by catsfanj 3 · 0⤊ 0⤋
distribute the (-x^2) thats all i remember from that klass...
2007-12-02 02:13:21 · answer #7 · answered by zombieslayer77 1 · 1⤊ 0⤋
foil it, make sure you multiply out each term!
2007-12-02 02:15:01 · answer #8 · answered by Jack B. 3 · 0⤊ 1⤋