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7 March, 10:22

Question

Select the correct answer.

Which interpretation of this expression is correct?

x2 + 8x + 15

+2
Answers (2)
  1. 7 March, 13:40
    0
    You have to factor this. What factors of 15 (multiplied) but add to give you 8? Five and three. (X+5) (x+3)
  2. 7 March, 13:43
    0
    (x + 3), (x + 5) are the factors of the equation.

    Step-by-step explanation:

    x² + 8 x + 15 = 0

    x² + 3 x + 5 x + 15 = 0

    x (x + 3) + 5 (x + 3) = 0

    (x + 3) (x + 5) = 0

    Hence (x + 3), (x + 5) are the factors of the equation.
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