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11 June, 13:53

What is the factorization of the expression below? 4x^2-81

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Answers (2)
  1. 11 June, 13:56
    0
    (2x - 9) (2x + 9)

    Step-by-step explanation:

    4x² - 81

    (2x) ² - 9²

    (2x - 9) (2x + 9)
  2. 11 June, 14:23
    0
    (2x-9) (2x+9)

    Step-by-step explanation:

    4x^2-81

    Writing this as

    (2x) ^2 - 9^2

    We recognize this as the difference of squares

    a^2 - b^2 = (a-b) (a+b)

    (2x-9) (2x+9)
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