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11 May, 23:06

Multiply the following binomials. Show your work.

(2x + 1) (x - 3)

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Answers (2)
  1. 11 May, 23:36
    0
    Answer:2x^2-5x-3

    Step-by-step explanation: (2x + 1) (x - 3)

    Multiply x and 2

    Multiply x and 1

    The x just gets copied along.

    The answer is x

    x

    2*x evaluates to 2x

    2*x+1 evaluates to 2x+1

    x-3 evaluates to x-3

    First, you multiply the two First terms, the 2x and x together.

    Multiply 2x and x

    Multiply the x and x

    Multiply x and x

    Combine the x and x by adding the exponents, and keeping the x, to get

    The answer is x^2

    Second, you multiply the two Outer terms, the 2x and - 3 together.

    Multiply 2x and - 3

    Multiply x and 1

    The x just gets copied along.

    The answer is x

    x

    2x * - 3 = - 6x

    Third, you multiply the two Inner terms, the 1 and x together.

    Multiply 1 and x

    Multiply 1 and x

    The x just gets copied along.

    x

    -6x combines with x to give - 5x

    Lastly, you multiply the two Last terms, the 1 and - 3 together.

    Multiply 1 and - 3

    1

    1 * - 3 = - 3

    (2*x+1) * (x-3) evaluates to 2x^2-5x-3
  2. 12 May, 01:31
    0
    In this question, you would multiply by using FOIL.

    FOIL stands for First, Outside, Inside, Last.

    Solve by using FOIL:

    (2x + 1) (x - 3)

    First: (2x) (x) = 2x²

    Outside: (2x) (-3) = - 6x

    Inside: (1) (x) = x

    Last: (1) (-3) = - 3

    2x² - 6x + x - 3

    Combine like terms:

    2x² - 6x + x - 3

    2x² - 5x - 3

    Answer:

    2x² - 5x - 3
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