fritzi
Topic Author
Posts: 2598
Joined: Sat Jun 30, 2001 2:34 am

### Math Question Help.

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?

Factor:

t^2-2t+(3/4)

Solve for x:

x^4-13x^2+36=0

bobrayner
Posts: 2038
Joined: Sun Apr 27, 2003 8:03 am

### RE: Math Question Help.

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
Posts: 5880
Joined: Tue Oct 09, 2001 7:56 pm

### RE: Math Question Help.

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
Topic Author
Posts: 2598
Joined: Sat Jun 30, 2001 2:34 am

### RE: Math Question Help.

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
Topic Author
Posts: 2598
Joined: Sat Jun 30, 2001 2:34 am

### RE: Math Question Help.

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
Posts: 2453
Joined: Wed Jun 04, 2003 10:13 pm

### RE: Math Question Help.

(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
Posts: 900
Joined: Sat Sep 15, 2001 1:27 am

### RE: Math Question Help.

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
Posts: 2038
Joined: Sun Apr 27, 2003 8:03 am

### RE: Math Question Help.

ok, modulo x and modulo y
Cunning linguist

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