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12 March, 22:20

2. If f (x) = x - 7 and g (x) = 2x + 5, then what is f (x) * g (x) ?

2x^2 - 9x - 35

2x^2 + 9x - 35

2x^2 - 2x - 35

3x^2 - 9x - 35

3x-2

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Answers (1)
  1. 12 March, 22:34
    0
    2x² - 9x - 35

    Step-by-step explanation:

    f (x) * g (x) = (x - 7) (2x + 5)

    Each term in the second factor is multiplied by each term in the first factor, that is

    x (2x + 5) - 7 (2x + 5) ← distribute both parenthesis

    = 2x² + 5x - 14x - 35 ← collect like terms

    = 2x² - 9x - 35
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