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27 December, 11:45

Factor the expression 4b^2-9

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Answers (2)
  1. 27 December, 11:47
    0
    (2b - 3) (2b + 3)

    Step-by-step explanation:

    4b² - 9 ← is a difference of squares and factors in general as

    a² - b² = (a - b) (a + b)

    4b² = (2b) ² ⇒ a = 2b and 9 = 3² ⇒ b = 3, so

    4b² - 9 = (2b) ² - 3² = (2b - 3) (2b + 3)
  2. 27 December, 12:09
    0
    answer is 7

    Step-by-step explanation:

    4b squared minus 9,16 is 4b squared because 4 time 4 is 16. thats how you would solve squared. then you want to minus 16 by 9, then your answer should be 7.
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