11
practice testMultiple Choice

Practice Test

Question 11 • Precalculus

Riley makes a mistake in step 2 while doing her homework. What was her mistake? the fraction with numerator x and denominator x squared minus 5 x plus 6 plus the fraction with numerator 3 and denominator x plus 3 Riley's Work Step 1: the fraction with numerator x and denominator open paren x minus 2 close paren times open paren x minus 3 close paren plus the fraction with numerator 3 and denominator x plus 3 Step 2: the fraction with numerator x and denominator open paren x minus 2 close paren times open paren x plus 3 close paren plus the fraction with numerator 3 times open paren x minus 2 close paren and denominator open paren x minus 2 close paren times open paren x plus 3 close paren Step 3: the fraction with numerator x plus 3 x minus 6 and denominator open paren x minus 2 close paren times open paren x plus 3 close paren Step 4: the fraction with numerator 4 x minus 6 and denominator open paren x minus 2 close paren times open paren x plus 3 close paren

Answer
A
She added the two fractions incorrectly.
B
She did not multiply the first fraction by a factor.
C
She did not distribute the negative correctly.
D
She used the wrong common denominator.
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Riley makes a mistake in step 2 while doing her…