Sunday, May 19, 2013

Decopose in simply fractions. 2/2x(6x+4)

We'll have to get 2 irreducible fractions because of the 2
factors from denominator.


2/2x(6x+4) = 1/x(6x+4)

The final ratio
1/x(6x+4) is the result of addition or subtraction of 2 elementary fractions, as it
follows:


1/x(6x+4) = A/x + B/(6x+4)
(1)


We'll multiply by x(6x+4) both
sides:


1 = A(6x+4) + Bx


We'll remove
the brackets:


1 = 6Ax + 4A + Bx


We'll
factorize by x to the right side:


1 = x(6A+B) +
4A


Comparing both sides, we'll
get:


6A+B = 0


4A = 1 => A =
1/4


6/4 + B = 0


B =
-3/2


We'll substitute A and B into the expression (1) and we'll get
the algebraic sum of 2 elementary
fractions:


2/2x(6x+4) = 1/x(6x+4) = 1/4x - 3/2(6x +
4)

No comments:

Post a Comment

How is Anne's goal of wanting "to go on living even after my death" fulfilled in Anne Frank: The Diary of a Young Girl?I didn't get how it was...

I think you are right! I don't believe that many of the Jews who were herded into the concentration camps actually understood the eno...