Question 1162543
<pre>

{{{ x/(x+1)(x+2) }}}

{{{ x/(x+1)(x+2) = A/(x+1)+B/(x+2)}}}

Multiply through by (x+1)(x+2)

{{{x = A(x+2)+B(x+1)}}}

Substitute x=-2

{{{-2 = A(-2+2)+B(-2+1)}}}

{{{-2 = A(0)+B(-1)}}}

{{{-2 = -B}}}

{{{B=2}}}

Substitute x=-1

{{{-1 = A(-1+2)+2(-1+1)}}}

{{{-1 = A(1)+2(0)}}}

{{{-1 = A}}}

{{{ x/(x+1)(x+2) = (-1)/(x+1)+2/(x+2)}}}

Edwin</pre>