Thursday

January 29, 2015

January 29, 2015

Posted by **Sophie** on Wednesday, September 11, 2013 at 10:21pm.

2x(2x)^2: 2x(4x^2)?

Now do I multiply or add the big numbers?

also Im having trouble on these:

1. x^2(xy)^3: x2(x^3y^3)

2. 3x^2(2x)^3: 3x^2 (8x^3)

3. -2x^2y(3xy^2)^2

4. -(3x)^2: -(9x^2)?

5. 5x(2x^2)^2

6. -3x^2y(xy)^3

7. 2xy^2(3x^2y)^3

Everything is done but the last step, please help, thanks

- Please any math helper!! -
**Writeacher**, Wednesday, September 11, 2013 at 10:43pmIf no math tutor comes online who can help you, you should see if you can find explanations here:

http://www.khanacademy.org/

There is no need to connect with Facebook or anything. Just scroll down to the Math section (just under BROWSE OUR LIBRARY) and find the math level you're studying. Once you're in the right section, go through the videos in which different math concepts are taught.

Make sure you don't just sit around here waiting for someone to show up!!

- Please any math helper!! -
**Writeacher**, Wednesday, September 11, 2013 at 10:46pmHere are other websites that may have explanations to help:

http://www.aaamath.com/

http://mathforum.org/dr.math/

- Please any math helper!! -
**Steve**, Wednesday, September 11, 2013 at 11:55pmNot sure what it is you want to do. What is the "last step"? The "big numbers" are just coefficients, and can be moved around as needed, since multiplication is commutative.

x^2(xy)^3: x2(x^3y^3): x^5y^3

3x^2(2x)^3: 3x^2 (8x^3): 3x^2 * 8x^3: 24x^5

-2x^2y(3xy^2)^2: (-2)(x^2y)(9)(x^2y^4): -18x^4y^5

-(3x)^2: -(9x^2): (-1)(9x^2): (-1)(9)x^2: -9x^2

5x(2x^2)^2: (5)(x)(4x^4): 20x^5

-3x^2y(xy)^3: -3x^5y^4

2xy^2(3x^2y)^3: 54x^7y^5

One thing they didn't test was things like

(-3xy^2)^2: (-3)^2 x^2y^4: 9x^2y^4

having a "-" inside the parens can make a difference!

**Answer this Question**

**Related Questions**

Math help - How do you do these questions, I have all my steps done until the ...

Math - How do you do these questions, I have all my steps until the last one: 2x...

Math - How do you do these questions, I have all my steps done until the last ...

Math Ms Sue check - How do you do these questions, I have all my steps done ...

To: bobpursley or any math helper - please help me on my questions, I have a big...

Maths - you have to solve the following by finding the value of x and y. can u ...

math - 1. First of all, pick the number of times a week that you eat chocolate. ...

math for belinda to help me please - 1.x^2-9x+14 2.GCF of m^2n^2+3m Oh haha ...

math[fractions] - how would u multiply two fractions ex. 2 2/3 times 3 5/6 First...

Math ---Helper - Helper I really need ur help with some of my math questions ...