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2 April, 12:20

What is the complete factorization of * ^2+4x-45

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  1. 2 April, 12:43
    0
    =x^2+x (9-5) - 45

    =x^2+9x-5x-45

    =x (x+9) - 5 (x-9)

    = (x+9) (x-5)
  2. 2 April, 12:44
    0
    Step-by-step explanation:

    *²+4x-45 = (x²+4x+4) - 4 - 45

    = (x+2) ² - 7²

    by identity : a²-b² = (a+b) (a-b

    (x+2) ² - 7² = (x+2-7) (x+2+7)

    the factorization is:

    *²+4x-45 = (x-5) (x+9)
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