Wednesday

August 27, 2014

August 27, 2014

Posted by **MARIAH** on Thursday, October 28, 2010 at 6:47pm.

1. 7a-21a^2/9a^2+6a+1 x 9a^2+6a+1/9a^2-1

2. 2a+2/8a+24 x 4x+12/2x^2-2

- math -
**Reiny**, Thursday, October 28, 2010 at 9:27pmYou have to use brackets.

I think you mean ...

(7a-21a^2)/(9a^2+6a+1) (9a^2+6a+1)/(9a^2-1)

= 7a(1 - 3a)/(9a^2+6a+1) (9a^2+6a+1)/((3a-1)(3a+1))

= -7a/(3a+1)

the second one factors nicely too once you put the brackets in

**Related Questions**

math,algebra - Use the five properties of exponents to simplify each of the ...

Algebra - I have no clue here. Simplify -8[0 - (97-95)]=_________.

MATH - How do you write fractions in simplest form? for example I need ...

Algergra - I am stumped! I have been working on these problems for the longest ...

Math - Could someone please help me with this problem. I have worked most of it ...

English - In my sentence I typed, "I did not have a clue what to expect," and ...

math,help - Can someone show me how do i multiply the following fractions: (n^2-...

math,help - okay Directions: find the following squares. Problem: ((w)-(1)/(4))^...

Capital Markets - anyone have knowledge of bonds, mutual funds, and stripping ...

Honors Chemistry - In my vocabulary crossword puzzle, I have one clue answer ...