The answer is 1 plus or minus the square root or 5 over 2. Please explain your answer step by step.
2006-07-02 17:36:33 · 5 answers · asked by NONAME 1 in Science & Mathematics ➔ Mathematics
Oh my goodness, I forgot sall this stuff, how will I help my baby with his homework when he gets older?
2006-07-02 18:51:40 · answer #1 · answered by Lisa N 5 · 0⤊ 0⤋
I think you almost have to guess what one of the zeros is. You can cheat, of course, by looking at the solution (for example, the output of the solver at http://www.quickmath.com/ ) After that, it's a breeze with synthetic division and the quadratic formula. I was hoping I could tell you how to do it without guessing one zero, but I cannot remember how to do it. I must have it in a textbook somewhere, but I don't feel like hunting for it right now. If you need help with synthetic division, check here: http://www.purplemath.com/modules/synthdiv.htm
Good luck!
2006-07-03 00:42:55 · answer #2 · answered by anonymous 7 · 0⤊ 0⤋
there's 3 zeros because it's a cubic equation. I used symthetic division to find x=3 as one of the zeros. Then divided x-3 (because x-3=0 yields x=3) by P(x) and that gave X^2-X-1. Using quadratic formula you get [1+(SQRT)5]/2 and [1-(SQRT)5]/2.
so your zeros are:
3
[1+(SQRT)5]/2
[1-(SQRT)5]/2
2006-07-03 00:55:10 · answer #3 · answered by Enchantress 3 · 0⤊ 0⤋
i don't miss those days at all!...whew!
2006-07-03 00:41:23 · answer #4 · answered by shorty82 5 · 0⤊ 0⤋
What!!!
2006-07-03 00:40:21 · answer #5 · answered by Kendall G 1 · 0⤊ 0⤋