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7 March, 08:26

Multiply.

(3x + 2) (3x - 2)

A. x² + 12x - 4

B. 9x² - 12x - 4

c. 9x - 4

D. 9x² + 4

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Answers (1)
  1. 7 March, 12:21
    0
    Answer: 9x²-4

    Step-by-step explanation:

    To solve use the formula (known as the difference of squares) a²-b² = (a+b) (a-b) and substitute a with 3x and b with 2 and then substitute to find: (3x) ²-2² = 9x²-4
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