Monday

March 2, 2015

March 2, 2015

Posted by **David** on Thursday, August 7, 2008 at 7:15pm.

Simplify:

(2a^2+13a-7/3a^3-27a)(4a^2-1/9a^2)

- Math -
**drwls**, Thursday, August 7, 2008 at 7:36pmThis probably should have been written as

(2a^2+13a-7)/[(3a^3-27a)(4a^2-1)/9a^2]

Try factoring 2a^2 +13a -7 into

(2a -1)(a+7)

and 3a^3-27a into

3a(a^2-9 = 3a(a+3)(a-3)

and 4a^2 -1 into (2a +1) (2a -1)

The 3a and (2a-1) terms will cancel.

- Math -
**David**, Thursday, August 7, 2008 at 7:49pmNo,

I'm sure the problem is written like this:

[(3a^3-27a)/(2a^2+13a-7)]/[9a^2/4a^2-1)]

And to divide you multiply by the reciprocal.

So i still don't get the problem I also know to factor, but I'm stil confused.

- Math -
**bobpursley**, Thursday, August 7, 2008 at 7:53pmWhat you just typed as sure as the problem as written is NOT close to what you posted. Factor, then divide out common factors.

**Answer this Question**

**Related Questions**

Math - No, I'm sure the problem is written like this: [(3a^3-27a)/(2a^2+13a-7...

Mathematics - Hello, I am new to this website. I havea summer assignment on ...

Simplify (Another Question/problem) 3 - Simplify. (27a^(-6) )^(-2/3) I got 1/(9a...

Math simplify - How Do I simplify this? a) 4√-27a^3b

algebra - Can someone please help me with these problems? Write (27a^-3)^-2/3 in...

algebra - write (27a^-3)^(-2/3) in simplest form. solve log(6x+11)=2 please and ...

algebra - write (27a^-3)^(-2/3) in simplest form. solve log(6x+11)=2 please and ...

Algebra - Help please-I'm totally lost- How would I simplify (2x^5 y^4 z^3/x^-1...

Algebra - Help please-I'm totally lost- How would I simplify (2x^5 y^4 z^3/x^-1 ...

Math - simplify: Radical 108a - Radical 27a