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Math Help - Algebra 2 help

  1. #1
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    Algebra 2 help

    Need help with Algebra 2 test
    ok i have a study guide and cant seem to find the answers or how to do it
    can anyone write the steps of these problems
    8x to the 3 power +1
    *8x^3+1

    *(x-2)^3

    * 5(2u+3)>2(u-3)+u

    i have the answer but dont know how to do them
    please help with steps
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  2. #2
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    Quote Originally Posted by schecter22107 View Post
    Need help with Algebra 2 test
    ok i have a study guide and cant seem to find the answers or how to do it
    can anyone write the steps of these problems
    8x to the 3 power +1
    *8x^3+1

    *(x-2)^3

    * 5(2u+3)>2(u-3)+u

    i have the answer but dont know how to do them
    please help with steps
    what are you trying to do with these expressions? Solve them? If so what are they equal to? or maybe graph them?

    You need to give us more information. At the moment they are just numbers on a page.
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  3. #3
    No one in Particular VonNemo19's Avatar
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    Quote Originally Posted by schecter22107 View Post
    Need help with Algebra 2 test
    ok i have a study guide and cant seem to find the answers or how to do it
    can anyone write the steps of these problems
    8x to the 3 power +1
    *8x^3+1

    *(x-2)^3

    * 5(2u+3)>2(u-3)+u

    i have the answer but dont know how to do them
    please help with steps
    The first is a sum of cubes. Factor according to the formula that you were given. a=2x and b=1.

    I assume that you are to expand the second. So foil...

    For the third

    5(2u+3)>2(u-3)+u
    Get rid of the parentheses by distributing
    10u+15>2u-6+u
    10u+15>3u-6
    7u>-21
    u>-3
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  4. #4
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    factor the first one
    multiply the second one
    solve the last one
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  5. #5
    No one in Particular VonNemo19's Avatar
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    Quote Originally Posted by schecter22107 View Post
    factor the first one
    multiply the second one
    solve the last one
    exactly.
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  6. #6
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    for the second one the answer is x^3-6x^2+12x-8
    i did foil but i dont know how to get the 12x
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  7. #7
    No one in Particular VonNemo19's Avatar
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    Quote Originally Posted by schecter22107 View Post
    for the second one the answer is x^3-6x^2+12x-8
    i did foil but i dont know how to get the 12x
    (x-2)^3=(x-2)(x^2-4x+4)=x^3-4x^2+4x-2x^2+8x-8

    Now collect like terms.
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  8. #8
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    Quote Originally Posted by VonNemo19 View Post
    I assume that you are to expand the second. So foil...

    Quote Originally Posted by VonNemo19 View Post
    exactly.
    To use the word exactly, no assumptions would be required?

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  9. #9
    No one in Particular VonNemo19's Avatar
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    Quote Originally Posted by pickslides View Post
    To use the word exactly, no assumptions would be required?

    I tutor math at a college. I deal with this every day.
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  10. #10
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    thank you
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  11. #11
    No one in Particular VonNemo19's Avatar
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    Your welcome.
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  12. #12
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    Quote Originally Posted by VonNemo19 View Post
    I tutor math at a college. I deal with this every day.
    I know the feeling as I also have this experience.
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