Simplify the rational expression.
-$\frac { a y - 3 a + 4 y - 12 } { a y - 3 a + 7 y - 21 }$
A) $\frac { 4 y - 12 } { 7 y - 21 }$
B) $\frac { ( a + 4 ) ( y - 3 ) } { ( a + 7 ) ( y + 3 ) }$
C) $\frac { ( a + 4 ) ( y + 3 ) } { ( a + 7 ) ( y - 3 ) }$
D) $\frac { a + 4 } { a + 7 }$

Question

Quizplus · Accepted Answer

The expression can be factored as $\frac{(a+4)(y-3)}{(a+7)(y-3)}$, and the common factor $(y-3)$ cancels out, leaving $\frac{a+4}{a+7}$.

Simplify the Rational Expression ay−3a+4y−12ay−3a+7y−21\frac { a y - 3 a + 4 y - 12 } { a y - 3 a + 7 y - 21 }ay−3a+7y−21ay−3a+4y−12​

Simplify the Rational Expression $\frac { a y - 3 a + 4 y - 12 } { a y - 3 a + 7 y - 21 }$