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Math Help - expand and simplify

  1. #1
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    expand and simplify

    (2x^2+9x+10)(x+4)
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by william View Post
    (2x^2+9x+10)(x+4)
    Start it out this way:

    (x+4)(2x^2+9x+10)=x(2x^2+9x+10)+4(2x^2+9x+10)=
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  3. #3
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    Quote Originally Posted by william View Post
    (2x^2+9x+10)(x+4)
    Hmmm there is a rule you gotta learn to know how to expand... but i can't remember it

    Here are my two cents:
    ({\color{red}2x^2}+{\color[rgb]{.5,0,1}9x}+{\color{blue}10})(x+4)={\color{red}2x^  2}(x+4)+{\color[rgb]{.5,0,1}9x}(x+4)+{\color{blue}10}(x+4)

    {\color{red}2x^2}(x+4)={\color{red}2x^2}*x+{\color  {red}2x^2}*4
    {\color[rgb]{.5,0,1}9x}(x+4)={\color[rgb]{.5,0,1}9x}*x+{\color[rgb]{.5,0,1}9x}*4
    {\color{blue}10}(x+4)={\color{blue}10}*x+{\color{b  lue}10}*4


    Do you get it ?
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  4. #4
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    Quote Originally Posted by masters View Post
    Start it out this way:

    (x+4)(2x^2+9x+10)=x(2x^2+9x+10)+4(2x^2+9x+10)=
    So, it = 2x^3 +17x^2+46x+40?
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  5. #5
    A riddle wrapped in an enigma
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    Quote Originally Posted by william View Post
    So, it = 2x^3 +17x^2+46x+40?
    Nice Job!
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