Fritzi From United Arab Emirates, joined Jun 2001, 2762 posts, RR: 2 Posted Wed Oct 1 2003 12:12:21 UTC (10 years 9 months 4 weeks 1 day 12 hours ago) and read 979 times:

A friend of mine asked me if I could help her with a few math questions but my brain doesnt seem to be working very well after last night.
Could someone help me with the anwers to the following questions?
Thanks in advance!
Factor:
t^2-2t+(3/4)
Solve for x:
x^4-13x^2+36=0

Bobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 6
Reply 1, posted Wed Oct 1 2003 12:36:04 UTC (10 years 9 months 4 weeks 1 day 12 hours ago) and read 970 times:

1.
x = 1.5 or 0.5
2.
This is just a straightforward quadratic too!
Imagine x²=y; then solve y²-13y+36=0. It boils down to y=4 and y=9.
So, x=2 or x=3.

Cunning linguist

Andreas From Germany, joined Oct 2001, 6104 posts, RR: 31
Reply 2, posted Wed Oct 1 2003 12:45:03 UTC (10 years 9 months 4 weeks 1 day 12 hours ago) and read 965 times:

Bob, quite obviously you've just found another excuse to prevent yourself from gardening

I know it's only VfB but I like it!

Fritzi From United Arab Emirates, joined Jun 2001, 2762 posts, RR: 2
Reply 3, posted Wed Oct 1 2003 12:48:38 UTC (10 years 9 months 4 weeks 1 day 12 hours ago) and read 962 times:

Thanks for the help Bob.
I owe you a beer next time you come in Vienna!
Note to self: Stop partying during the weeks!

Fritzi From United Arab Emirates, joined Jun 2001, 2762 posts, RR: 2
Reply 4, posted Wed Oct 1 2003 15:20:06 UTC (10 years 9 months 4 weeks 1 day 9 hours ago) and read 943 times:

Sorry to pester guys you with one more question:
Solve:
(6/x)+3/(x+2) =2
The one who helps will get a beer the next time he/she comes to vienna.
Thanx

JAL777 From , joined Dec 1969, posts, RR:
Reply 5, posted Wed Oct 1 2003 15:26:15 UTC (10 years 9 months 4 weeks 1 day 9 hours ago) and read 939 times:

(6/x) + 3/(x+2) = 2
6(x+2) +3x=2(x+2)(x)
6x + 12 + 3x = 2x^2 + 4x
0=2x^2 - 5x - 12
x=4
x also has another value but I don't feel like figuring that one out right now.[Edited 2003-10-01 15:28:13]

Avi From Israel, joined Sep 2001, 939 posts, RR: 6
Reply 6, posted Wed Oct 1 2003 15:32:23 UTC (10 years 9 months 4 weeks 1 day 9 hours ago) and read 932 times:

Solved by Bobrayner:
2.
This is just a straightforward quadratic too!
Imagine x²=y; then solve y²-13y+36=0. It boils down to y=4 and y=9.
So, x=2 or x=3.
If x²=y and y=4 or y=9 than x=2, x=-2 , x=3 and x=-3 !!!

Long live the B747

Bobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 6
Reply 7, posted Wed Oct 1 2003 15:35:00 UTC (10 years 9 months 4 weeks 1 day 9 hours ago) and read 930 times:

ok, modulo x and modulo y

Cunning linguist

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