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18 April, 00:52

Let f (x) = 3x2 - 2x + 6 and g (x) = 7x - 4. Identify the rule for f+g.

A

3x2 + 7x + 10

B. 3x2 - 9x + 10

C. 147x2 - 182x + 62

D. 3x2 + 5x + 2

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Answers (1)
  1. 18 April, 04:32
    0
    D. 3x2 + 5x + 2

    Step-by-step explanation:

    To add two polynomials, we add all the common terms.

    In this problem, we have that:

    f (x) = 3x² - 2x + 6

    g (x) = 7x - 4

    f (x) + g (x) = 3x² - 2x + 6 + 7x - 4 = 3x² - 2x + 7x + 6 - 4 = 3x² + 5x + 2

    So the correct answer is:

    D. 3x2 + 5x + 2
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