College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 5, Systems of Equations and Inequalities - Section 5.3 - Partial Fractions - 5.3 Exercises - Page 462: 22

Answer

$\frac{8x-3}{x(2x-1)}=\frac{3}{x}+\frac{2}{2x-1}$

Work Step by Step

$\frac{8x-3}{(2x^2-x)}$, factorising $2x^2-x=x(2x-1)$: $\frac{8x-3}{x(2x-1)}=\frac{A}{x}+\frac{B}{2x-1}$, $8x-3=A(2x-1)+Bx$, $8x-3=2Ax-A+Bx$, $8x-3=(2A+B)x-A$, $(2A+B)x=8x$, $2A+B=8$ and $-A=-3, A=3$: substituting back into the equation, $6+B=8, B=2$: thus, $\frac{8x-3}{x(2x-1)}=\frac{3}{x}+\frac{2}{2x-1}$
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