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15 November, 06:08

12. What is the product of (a-5) and (a+3) ?

A. A2-15

B. A2+2a-15

C. A2-2a-15

D. AS-2

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Answers (2)
  1. 15 November, 07:09
    0
    Answer:C

    Step-by-step explanation:

    (a-5) * (a+3)

    a*a+a*3 + (-5) * a + (-5) * 3

    a^2+3a-5a-15

    a^2-2a-15
  2. 15 November, 08:21
    0
    C. a²-2a-15

    Step-by-step explanation:

    (a-5) (a+3)

    Expand the bracket

    a (a+3) - 5 (a+3)

    a²+3a-5a-15

    a²-2a-15
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