Results 1 to 2 of 2

Math Help - Intermediate Algebra

  1. #1
    Member
    Joined
    Apr 2008
    Posts
    79

    Intermediate Algebra

    Simplify the following radicals. Assume that the variables can represent a positive number.
    square root of (4x)^2
    Would that be 2x?

    cubed square root of -125d^3
    Would that be 5d^3

    Find the domain of the given function.
    f(x)=square root of 3x-8
    I added 8. 3x is greater than 8/3.
    My answer is (-infinity, 8/3]

    Simplify
    square root of 32x^5y^9
    This is my answer. 2x^4y^3 square root 2xy^3
    Thanks.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    12
    Awards
    1
    Quote Originally Posted by rowdy3 View Post
    Simplify the following radicals. Assume that the variables can represent a positive number.
    square root of (4x)^2
    Would that be 2x?

    No because \sqrt{(4x)^2}=\sqrt{16x^2}=4x

    cubed square root of -125d^3
    Would that be 5d^3

    No, because \sqrt[3]{-125d^3}=-5d

    Find the domain of the given function.
    f(x)=square root of 3x-8
    I added 8. 3x is greater than 8/3.
    My answer is (-infinity, 8/3]

    No, because 3x-8\geq0\Longrightarrow x\geq\frac{8}{3}
    D=\left[\frac{8}{3},+\infty\right)

    Simplify
    square root of 32x^5y^9
    This is my answer. 2x^4y^3 square root 2xy^3

    No, because \sqrt{32 x^5 y^9}=\sqrt{16 \cdot 2 \cdot x^4 \cdot x \cdot y^8 \cdot y}=4x^2 y^4 \sqrt{2xy}

    Thanks.

    Some solutions in Red.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Intermediate algebra help!!!
    Posted in the Algebra Forum
    Replies: 1
    Last Post: March 2nd 2012, 05:59 PM
  2. Intermediate Algebra Help Please
    Posted in the Algebra Forum
    Replies: 2
    Last Post: April 2nd 2010, 11:03 AM
  3. Intermediate Algebra Help Please
    Posted in the Algebra Forum
    Replies: 1
    Last Post: March 28th 2010, 06:54 PM
  4. intermediate Algebra HELP
    Posted in the Algebra Forum
    Replies: 7
    Last Post: May 20th 2007, 09:03 PM
  5. Algebra Intermediate
    Posted in the Advanced Algebra Forum
    Replies: 4
    Last Post: October 9th 2005, 06:30 PM

Search Tags


/mathhelpforum @mathhelpforum