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Math Help - Basic Operations with polynomials

  1. #1
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    Basic Operations with polynomials

    Ok i havent done these in a looong time and i need someone to refresh my memory lol

    which of the following expressions represents the product of 3 less than twice x and 2 more than the quantity 3 times x?
    Answer: 6x^2 - 5x - 6

    looks simple enough but i cannot remember anything, i need to know how to get that answer, thanks in advance!
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by micro31337 View Post
    Ok i havent done these in a looong time and i need someone to refresh my memory lol

    which of the following expressions represents the product of 3 less than twice x and 2 more than the quantity 3 times x?
    Answer: 6x^2 - 5x - 6

    looks simple enough but i cannot remember anything, i need to know how to get that answer, thanks in advance!
    twice x means 2x. so 3 less than that is 2x - 3. 3 times x is just 3x and 2 more than that is 3x + 2. the quantity we are looking for, it the product (that is, we multiply the two), thus we want

    (2x - 3)(3x + 2) = 6x^2 -5x - 6
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    oooooh *hits self on head* thanks alot man!
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by micro31337 View Post
    oooooh *hits self on head* thanks alot man!
    don't hit yourself on the head

    rather, familiarize yourself with math vocabulary. there are a few buzz words you need to get acquainted with that can help you translate word problems into math problems.

    example:

    sum means add
    product means multiply
    difference means subtract
    twice means two times
    thrice means three times
    less means subtract, in the sense that you subtract whatever something is less by
    more means add, analogous to less

    get used to these words and others that will help you translate from english to math...then you won't have to be slapping your head at these things, but you can laugh and do the problem and write a note to your professor at the end, "don't insult my intelligence with such trivial problems" ...be sure to put a at the end, or your professor might take that the wrong way


    ...i'm kidding about that note thing. you can only do things like that when you're older...adults don't like kids mouthing off
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    lol thanks man ill write those down, the only ones that always confuse me are product and difference, the other ones im ok with. im actually studying for a math college placement test, and im trying to make sure i know all the simple stuff you know. lol @ the note thing
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by micro31337 View Post
    lol thanks man ill write those down, the only ones that always confuse me are product and difference, the other ones im ok with. im actually studying for a math college placement test, and im trying to make sure i know all the simple stuff you know. lol @ the note thing
    you're welcome

    and good luck
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