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Math Question Help.  
User currently offlineFritzi From United Arab Emirates, joined Jun 2001, 2762 posts, RR: 2
Posted (9 years 8 months 3 weeks 2 days 8 hours ago) and read 742 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



7 replies: All unread, jump to last
 
User currently offlineBobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 7
Reply 1, posted (9 years 8 months 3 weeks 2 days 8 hours ago) and read 733 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
User currently offlineAndreas From Germany, joined Oct 2001, 6104 posts, RR: 34
Reply 2, posted (9 years 8 months 3 weeks 2 days 8 hours ago) and read 728 times:

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


I know it's only VfB but I like it!
User currently offlineFritzi From United Arab Emirates, joined Jun 2001, 2762 posts, RR: 2
Reply 3, posted (9 years 8 months 3 weeks 2 days 8 hours ago) and read 725 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!

User currently offlineFritzi From United Arab Emirates, joined Jun 2001, 2762 posts, RR: 2
Reply 4, posted (9 years 8 months 3 weeks 2 days 5 hours ago) and read 706 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

User currently offlineJAL777 From , joined Dec 1969, posts, RR:
Reply 5, posted (9 years 8 months 3 weeks 2 days 5 hours ago) and read 702 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]

User currently offlineAvi From Israel, joined Sep 2001, 922 posts, RR: 6
Reply 6, posted (9 years 8 months 3 weeks 2 days 5 hours ago) and read 695 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
User currently offlineBobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 7
Reply 7, posted (9 years 8 months 3 weeks 2 days 5 hours ago) and read 693 times:

ok, modulo x and modulo y  Smile/happy/getting dizzy


Cunning linguist
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