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Math Help - Multiply two parentheses with another term

  1. #1
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    Multiply two parentheses with another term

    My problem is that i don't know how to multiply parentheses such as
    (x-4)(x+2)(4/2) or (6/5)(5)(w-3). Is there any specific rule regarding this?
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  2. #2
    Senior Member Twig's Avatar
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    A rule of thumb is that every term in a paraenthesis should be multiplied with every term in another.

    For ex  (x-2)(x-3)

    Begin with the x in the first parenthesis, multiply this with the x in the second paraenthesis then the -3. Then do the same thing for the -2 in the first.

     (x-2)(x-3) = x^2 -3x -2x +6
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  3. #3
    Like a stone-audioslave ADARSH's Avatar
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    Quote Originally Posted by strunz View Post
    My problem is that i don't know how to multiply parentheses such as
    (x-4)(x+2)(4/2) or (6/5)(5)(w-3). Is there any specific rule regarding this?
    Order of operations - Wikipedia, the free encyclopedia

    I will do one for you

    (x+4)(x+2)(4/2)

    (4/2)= (2)

    (x+4)(x+2)(2)

    (x+4) ( (2)x +(2)(2) )

    (x+4)(2x +4)

    (x(2x+4) + 4(2x+4) )

    ((x*2x + x*4) + (4*2x + 4*4))

    (2x^2 + 4x + 8x +16)

    (2x^2 + 12x + 16)

    Now try and tell me the answer of second.
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