Accedmychevron_right11thchevron_rightmathchevron_rightPartial Fractionschevron_rightExercise 5.2

Solution

Let:

2x+32(x2)(x2+2)2=Ax2+Bx+Cx2+2+Dx+E(x2+2)2\frac{2x+32}{(x-2)(x^2+2)^2}=\frac{A}{x-2}+\frac{Bx+C}{x^2+2}+\frac{Dx+E}{(x^2+2)^2}

Clearing denominators and solving gives:

A=1,B=1,C=2,D=6,E=10A=1,\quad B=-1,\quad C=-2,\quad D=-6,\quad E=-10

Hence:

2x+32(x2)(x2+2)2=1x2x+2x2+26x+10(x2+2)2\boxed{\frac{2x+32}{(x-2)(x^2+2)^2}=\frac{1}{x-2}-\frac{x+2}{x^2+2}-\frac{6x+10}{(x^2+2)^2}}