Riley makes a mistake in step 2 while doing her homework. What was her mistake? StartFraction x Over x squared minus 5 x 6 EndFraction StartFraction x Over x 3 EndFraction Step 1: StartFraction x Over (x minus 2)(x minus 3) EndFraction StartFraction 3 Over x 3 EndFraction Step 2: StartFraction x Over (x minus 2) (x 3) EndFraction 3 (x minus 2) Over (x minus 2) (x 3) EndFraction Step 3: StartFraction x 3 x minus 6 Over (x minus 2) (x 3) EndFraction Step 4: StartFraction 4 x minus 6 Over (x minus 2) (x 3) EndFraction She added the two fractions incorrectly. She used the wrong common denominator. She did not distribute the negative correctly. She did not multiply the first fraction by a factor.