Maths

posted by .

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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