# TSI Math: Adding and Simplifying Fractions

What is the sum of and ?

Intermediate Algebra and Functions | Rational and Exponential Expressions, Equations, and Functions |

Mathematics and Statistics Assessment | Rational and Exponential Expressions, Equations, and Functions |

Product Type | TSI |

TSI | Mathematics and Statistics Assessment TSI Math TSI Mathematics |

TSI Math | Intermediate Algebra and Functions |

TSI Mathematics | Intermediate Algebra and Functions |

Test Prep | TSI |

### Transcript

the numerator is right So we got twenty seven plus

three x Now we need to think about what we

can cancel Well we'll have to factor the numerator and

the denominator factor A three out of the numerator they're

on We've got three times quantity nine plus x and

then x squared minus eighty one Well that's x plus

nine and x minus nine It looks just like that

right You were tipped off that x squared and then

nothing x and then a number there That's perfect square

usually is a big hint on these kind of problems

so recognize it All right well then we have nine

plus acts is uh well x plus nine So cancel

this factor from both sides of the fraction and we're

left with three over x minus nine So the answer

is b and that's it for ah goodbye to this 00:01:03.448 --> [endTime] section