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Simplify the Rational Expression ay3a+4y12ay3a+7y21\frac { a y - 3 a + 4 y - 12 } { a y - 3 a + 7 y - 21 }

Question 21

Multiple Choice

Simplify the rational expression.
- ay3a+4y12ay3a+7y21\frac { a y - 3 a + 4 y - 12 } { a y - 3 a + 7 y - 21 }


A) 4y127y21\frac { 4 y - 12 } { 7 y - 21 }
B) (a+4) (y3) (a+7) (y+3) \frac { ( a + 4 ) ( y - 3 ) } { ( a + 7 ) ( y + 3 ) }
C) (a+4) (y+3) (a+7) (y3) \frac { ( a + 4 ) ( y + 3 ) } { ( a + 7 ) ( y - 3 ) }
D) a+4a+7\frac { a + 4 } { a + 7 }

Correct Answer:

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