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25 January, 18:00

Which of the following is the standard form

of the polynomial function y = x (x + 5) (x - 3) ?

y = x2 + 2x - 15

y = x3 - 8x2 - 15x

y = x2 - 8x - 15

y = x3 + 2x2 - 15x

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Answers (1)
  1. 25 January, 18:17
    0
    y = x³ + 2x² - 15x

    Step-by-step explanation:

    Given

    x (x + 5) (x - 3) ← expand the second pair of factors using FOIL

    = x (x² - 3x + 5x - 15)

    = x (x² + 2x - 15) ← distribute the parenthesis by x

    = x³ + 2x² - 15x
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