Results 1 to 5 of 5

Thread: Help with some basic algebra

  1. #1
    Newbie
    Joined
    Nov 2006
    Posts
    9

    Help with some basic algebra

    Need help with a few of these

    Q1 Factorise this expression
    bx + by +mx + my

    Q2 make the symbol in brackets the subject

    t = 2(pie) sq2 l
    ---
    g

    (pie) = pie symbol

    sq2 = square root

    Make l the subject

    Q3. Same question again make the symbol in brackets the subject

    p-mg = mv(sq)
    ------
    r

    Make M the subject

    and (sq) is squared


    Q4. Simplify the expressions

    a(2) x a(3) x a(-5)

    The number in brackets is the power

    and square root 9a(4)b(2)


    Thank you very much all!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member OReilly's Avatar
    Joined
    Mar 2006
    Posts
    340
    Quote Originally Posted by jimmybob View Post

    Q1 Factorise this expression
    bx + by +mx + my
    $\displaystyle bx + by + mx + my = b(x + y) + m(x + y) = (x + y)(b + m)$
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member OReilly's Avatar
    Joined
    Mar 2006
    Posts
    340
    Quote Originally Posted by jimmybob View Post

    Q4. Simplify the expressions

    a(2) x a(3) x a(-5)

    The number in brackets is the power

    and square root 9a(4)b(2)


    Thank you very much all!
    I think i saw this question before on this forum but I will answer it again.

    $\displaystyle a^2 \cdot a^3 \cdot a^{ - 5} = a^5 \cdot \frac{1}{{a^5 }} = \frac{{a^5 }}{{a^5 }}1$

    $\displaystyle \sqrt {9a^4 b^2 } = 3a^2 b$
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Senior Member OReilly's Avatar
    Joined
    Mar 2006
    Posts
    340
    You posted Q4 again.

    Previous your post where those questions are is:
    http://www.mathhelpforum.com/math-he...l-subject.html

    Don't double post.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Senior Member OReilly's Avatar
    Joined
    Mar 2006
    Posts
    340
    Quote Originally Posted by jimmybob View Post

    Q3. Same question again make the symbol in brackets the subject

    p-mg = mv(sq)
    ------
    r

    Make M the subject

    and (sq) is squared
    Do you mean to solve equation for m?

    If it is then:

    $\displaystyle \begin{array}{l}
    p - mg = \frac{{mv^2 }}{r} \\
    \frac{{mv^2 }}{r} + mg = p \\
    \frac{{mv^2 + rmg}}{r} = p \\
    mv^2 + rmg = pr \\
    m(v^2 + rg) = pr \\
    m = \frac{{pr}}{{v^2 + rg}} \\
    \end{array}
    $
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Basic Algebra
    Posted in the Algebra Forum
    Replies: 2
    Last Post: Aug 12th 2011, 01:03 PM
  2. basic algebra
    Posted in the Algebra Forum
    Replies: 19
    Last Post: Feb 21st 2008, 05:42 AM
  3. Basic algebra
    Posted in the Algebra Forum
    Replies: 4
    Last Post: Nov 16th 2006, 11:31 PM
  4. basic algebra
    Posted in the Algebra Forum
    Replies: 3
    Last Post: Oct 12th 2005, 08:32 AM
  5. Basic Algebra Help Please
    Posted in the Algebra Forum
    Replies: 2
    Last Post: Jul 20th 2005, 11:01 PM

Search Tags


/mathhelpforum @mathhelpforum