What is the partial fraction decomposition of startfraction 7 x squared minus 6 x + 9 over 3 x (4 x squared + 9) endfraction? startfraction 1 over 3 x endfraction + startfraction x minus 2 over 4 x squared + 9 endfraction startfraction 1 over 3 x endfraction + startfraction x + 2 over 4 x squared + 9 endfraction startfraction negative 2 over 3 x endfraction + startfraction x minus 1 over 4 x squared + 9 endfraction startfraction negative 2 over 3 x endfraction + startfraction x + 1 over 4 x squared + 9 endfraction.