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March 28, 2017

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Please can you expand and simplify the following:

(2x-5)(x+3)

Many thanks.

Happy New Year

  • Maths - ,

    Learn and apply the FOIL method.
    (First, Outside, Inside, Last)
    That describes the pairs of terms that you must multiply and then add together.

    http://www.algebrahelp.com/lessons/simplifying/foilmethod/pg2.htm

    To learn algebra, you really need the practice doing this yourself

  • Maths - ,

    surely, it would be x^3-2x-15

    please correct me if i'm wrong

  • Maths (chelsea) - ,

    Chelsea is wrong. Only the -15 term is correct. There is no cubic (x^3) term

  • Maths - ,

    i looked at the site, now i'm really confused, could you just show me the answer and working out, we haven't done the foil method in school we do it differently.

  • Maths - ,

    What you are doing in school must be the same thing, perhaps with a different name.
    Why do you keep changing your name?
    When you multiply the first pair you get
    2x * x = 2x^2
    That is the first term.
    When you multiply the "inside" pair you get -5x
    Now you do the others and combine terms.

  • Maths - ,

    The answer you should get is
    2x^2 +x -15

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