Asked by chirag
x is a number such that x2+3x+9=0. What is the value of x3?
Answers
Answered by
Steve
since (x-3)(x^2+3x+9) = x^3 - 3^3
x^3 - 3^3 = 0
x^3 = 27
x^3 - 3^3 = 0
x^3 = 27
Answered by
Reiny
What a great way to do this question.
Did you see the round-about way I used ??
http://www.jiskha.com/display.cgi?id=1360597831
I was even thinking of using DeMoivre's theorem.
Did you see the round-about way I used ??
http://www.jiskha.com/display.cgi?id=1360597831
I was even thinking of using DeMoivre's theorem.
Answered by
Steve
I was going to show an alternative direct solution, but when I saw where it was headed, I blew it off.
Can't believe you
(a) slogged through it all
(b) got it right!
Can't believe you
(a) slogged through it all
(b) got it right!
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.