3
x - 8 =0
Factor the difference of cubes then use the quadratic formula
its x cubed minus 8 = zero
2006-09-06 14:16:01 · 7 answers · asked by Fries 4 in Science & Mathematics ➔ Mathematics
for all the people out there that think IAM an idiot and said the answer is 2... you are the idiot the answer is not 2 the first person who answered got it right... thank you kuxuru
2006-09-06 17:32:03 · update #1
x^3-8 = (x - 2)*(2*x + x^2 + 4)
where (2*x + x^2 + 4)
has roots of
- i*3^(1/2) - 1 and i*3^(1/2) - 1
2006-09-06 14:20:15 · answer #1 · answered by kuxuru 3 · 0⤊ 1⤋
x=-8/3 or x=8 depending on carriage returns.
Quadratic formula does not apply.
x cubed minus 8 = zero means x = 2
Who asked you this question?
2006-09-06 21:26:08 · answer #2 · answered by ppellet 3 · 0⤊ 0⤋
Gee..that's a tall order:
Divide (x^3-8) / (x-2) = x^2+2x+2
So far you got (x-2)(x^2+2x+2)
Completing the square you got,
(x^2+2x+1+1) = [(x+1)^2 + 1^2]
So, final answer: (x-2)[(x+1)^2 + 1^2]
Good luck
2006-09-06 21:23:36 · answer #3 · answered by alrivera_1 4 · 0⤊ 1⤋
x to the 3rd power = 8
x = 2
2006-09-06 21:21:08 · answer #4 · answered by saddlesore 3 · 0⤊ 0⤋
Don't hurt yourself, x=2
2006-09-06 21:20:51 · answer #5 · answered by dennismeng90 6 · 0⤊ 0⤋
Ow Ow Ow Ow Ow
2006-09-06 21:23:56 · answer #6 · answered by Gothic Martha™ 6 · 0⤊ 1⤋
DO YOUR OWN HOMEWORK!
2006-09-06 21:21:10 · answer #7 · answered by miatalise12560 6 · 2⤊ 0⤋