Subtract the rational expressions. Be sure to express your answer in simplest form. $\frac { 3 a } { a - 9 } - \frac { 27 } { a - 9 }$
A) 9
B) 3
C) $\frac { 3 a - 27 } { a + 9 }$
D) $\frac { 3 a + 27 } { a - 9 }$

Question

Quizplus · Accepted Answer

The expressions have the same denominator, so subtract the numerators: $3a - 27$. Factor the numerator: $3(a - 9)$. Simplify: $\frac{3(a - 9)}{a - 9} = 3$.

Subtract the Rational Expressions 3aa−9−27a−9\frac { 3 a } { a - 9 } - \frac { 27 } { a - 9 }a−93a​−a−927​

Subtract the Rational Expressions $\frac { 3 a } { a - 9 } - \frac { 27 } { a - 9 }$