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Math Help - please help with abridged multiplication

  1. #1
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    Thumbs up please help with abridged multiplication

    multiply by the formula or vice versa - to determine the polynomial multiplied.

    1. (10-3y)2 = 2. (m+3) (m+3) =

    3. (5x4y2)2 =
    4. (m+n)2 =
    5. (s-t)2 =
    6. (2a+5)2 =
    7. (-a+3c)2 =
    8. (-5x-3y)2 =
    9. c2 - 2cd + d2 =
    10. (10a+2)2 =
    11. (3m2 +4n) (3m + 4n) =
    12. (5-x) (5-x) =
    13. (x-y)2 =
    14. (p+3)2 =
    15. (4-3b)2 =
    16. (-2a-5b)2 =
    17. (-4+3m)2 =
    18. m2 + 2mn + n2 =


    any help would be much appreciated
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  2. #2
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    Re: please help with abridged multiplication

    Quote Originally Posted by nataku View Post
    multiply by the formula or vice versa - to determine the polynomial multiplied.

    1. (10-3y)2 = 2. (m+3) (m+3) =

    3. (5x4y2)2 =
    4. (m+n)2 =
    5. (s-t)2 =
    6. (2a+5)2 =
    7. (-a+3c)2 =
    8. (-5x-3y)2 =
    9. c2 - 2cd + d2 =
    10. (10a+2)2 =
    11. (3m2 +4n) (3m + 4n) =
    12. (5-x) (5-x) =
    13. (x-y)2 =
    14. (p+3)2 =
    15. (4-3b)2 =
    16. (-2a-5b)2 =
    17. (-4+3m)2 =
    18. m2 + 2mn + n2 =


    any help would be much appreciated
    We are not here to do your homework. Please limit your future threads to no more than three questions.

    All of these are based on the following formula: (a + b)^2 = a^2 + 2ab + b^2.

    So for the first one we have (10 - 3y)^2. We can identify, using the above formula, that a = 10 and b = -3y. So we have (10 - 3y)^2 = (10)^2 + 2(10)(-3y) + (-3y)^2. How do you simplify this?

    -Dan
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