Results 1 to 6 of 6

Math Help - Multiple variable factoring + check an answer?

  1. #1
    Junior Member
    Joined
    Mar 2012
    From
    United States
    Posts
    43

    Multiple variable factoring + check an answer?

    First question:
    How do you factor when you have multiple variables?

    Factor completely:
    100a5b - 36ab3

    4 will factor into both 100 and 36. And ab will factor into both the variable parts?

    ----
    Second:
    Factor completely:
    m3- 64

    m3 - 64 = (m-4)(m2+4m+16)

    Is that correct?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Mar 2012
    From
    Sheffield England
    Posts
    440
    Thanks
    76

    Re: Multiple variable factoring + check an answer?

    Correct so expression= 4ab(25a^4-9b^2)= 4ab(5a^2-3b)(5a^2+3b)
    You have the 2nd question correct
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Nov 2011
    From
    Crna Gora
    Posts
    420
    Thanks
    64

    Re: Multiple variable factoring + check an answer?

    Hint :

    100a^5b-36ab^3=ab\left(\left(10a^2\right)^2-(6b)^2\right)
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Mar 2012
    From
    United States
    Posts
    43

    Re: Multiple variable factoring + check an answer?

    Thank you! Princeps, can you explain or tell me what you did in the hint?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Mar 2012
    From
    United States
    Posts
    43

    Re: Multiple variable factoring + check an answer?

    Is it just simplifying? Because there are two 5a2 you then just square those -- like stating (5a2)(5a2)? And you get ten because there are 2 fives?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Senior Member
    Joined
    Nov 2011
    From
    Crna Gora
    Posts
    420
    Thanks
    64

    Re: Multiple variable factoring + check an answer?

    Quote Originally Posted by Kibbygirl View Post
    Is it just simplifying? Because there are two 5a2 you then just square those -- like stating (5a2)(5a2)? And you get ten because there are 2 fives?
    10^2 \cdot a^4 \cdot (ab)-6^2\cdot b^2\cdot(ab)=ab\left(10^2a^4-6^2b^2\right)
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Multiple Random Variable trouble
    Posted in the Statistics Forum
    Replies: 1
    Last Post: April 3rd 2012, 05:40 AM
  2. Replies: 2
    Last Post: June 1st 2008, 07:26 PM
  3. Inverse of a Multiple Variable Function
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 21st 2008, 07:18 PM
  4. Multiple Variable Equation, T-89 Titanium
    Posted in the Calculators Forum
    Replies: 3
    Last Post: February 19th 2008, 11:09 PM
  5. Multiple integral to check
    Posted in the Calculus Forum
    Replies: 3
    Last Post: May 17th 2007, 06:18 AM

Search Tags


/mathhelpforum @mathhelpforum