Monday

July 28, 2014

July 28, 2014

Posted by **Susie** on Tuesday, June 14, 2011 at 10:07am.

y-4/y-9 - y+1/y+9 + y-99/y^2-81

- algebra -
**bobpursley**, Tuesday, June 14, 2011 at 10:43amcommon denominator: (y+9)*(y-9)

I think this is what you meant.

(y-4)(y+9) -(y+1)(y-9) -(y-9) all that over the denominator.

y^2+5y-36 -y^2+8y+9 -y+9 over the denominator.

12y -27 over the denominator

3(4y-9) over the denominator.

- algebra -
**MathMate**, Tuesday, June 14, 2011 at 10:45amI have made a guess and put on the minimum parentheses for the problem to make sense. Do not forget to enclose numerators and denominators with parentheses when transcribing expressions from a book or other sources.

(y-4)/(y-9) - (y+1)/(y+9) + (y-99)/(y^2-81)

using (y-9)(y+9)=y²-81

=(y-4)/(y-9) - (y+1)/(y+9) + (y-99)/((y+9)(y-9))

=((y-4)(y+9)-(y+1)(y-9)+(y-99))/((y+9)(y-9))

=(y²+5y-36 - (y²-8y-9) + (y-99))/((y+9)(y-9))

=(14y-126)/((y+9)(y-9))

=14(y-9)/((y+9)(y-9))

=14/(y+9)

**Related Questions**

math- please help! - Please help with these 5 problems! I have the solutions but...

algebra - perform the indicated operations and simplify x-1/x-9-x+1/x+9+x-153/x^...

Algebra - Please perform the indicated operations and simplify (3x-5)^2-(2x+1)(x...

Algebra 1 - PERFORM THE INDICATED OPERATIONS AND SIMPLIFY. x-8/x-9-x+1/x+9+x-27/...

algebra - perform the indicated operations and if possibly simplify if a ...

algebra - perform the indicated operations and,if possibly,simplify,if a ...

Math - Perform the indicated operations and simplify: i^-31

Math - perform the indicated operations and simplify x-5/x-7-x-1/x+7+x-35/x^2-49

math 117 - perform the indicated operations and simplify z-4/z-6 - z+1/z+6 + z-...

Math - `Perform the indicated operations and simplify. (z-1)/(z-8)-(z+1)/(z+8)+(...