2/X + 2/X+1 = 3

X=1 X=?

Dunno Wot Else X Might Equal Help!

Printable View

- Aug 31st 2007, 12:50 PMsasha9193fraction equation
2/X + 2/X+1 = 3

X=1 X=?

Dunno Wot Else X Might Equal Help! - Aug 31st 2007, 12:56 PMred_dog
Find the common denominator and bring the equation to the form $\displaystyle ax^2+bx+c=0$

- Aug 31st 2007, 12:57 PMsasha9193
RED DOG plz give answer

- Aug 31st 2007, 12:58 PMsasha9193
i got like 30 seconds

- Aug 31st 2007, 01:01 PMtopsquark
I presume this is

$\displaystyle \frac{2}{x} + \frac{2}{x + 1} = 3$

To get rid of the fractions, multiply both sides by $\displaystyle x(x + 1)$

$\displaystyle x(x + 1) \cdot \left ( \frac{2}{x} + \frac{2}{x + 1} \right ) = x(x + 1) \cdot 3$

$\displaystyle 2(x + 1) + 2(x) = 3x(x + 1)$

$\displaystyle 2x + 2 + 2x = 3x^2 + 3x$

$\displaystyle 4x + 2 = 3x^2 + 3x$

$\displaystyle 3x^2 - x - 2 = 0$

Now use the quadratic formula.

-Dan - Aug 31st 2007, 01:04 PMsasha9193
need the answer quick dont have formula

- Aug 31st 2007, 01:05 PMsasha9193
plz some1 submit the answer

- Aug 31st 2007, 01:15 PMKrizalid