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blah2345

  • 4 years ago

How do you factor 4x2-81? (That's 4 x squared)

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  1. aroub
    • 4 years ago
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    (2x-9)(2x+9)

  2. dinainjune
    • 4 years ago
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    (2x+9)(2x-9)

  3. imranmeah91
    • 4 years ago
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    4(x^2 -81/4) 4(x- 9/2)(x+9/2) above answers are right too

  4. jahtoday
    • 4 years ago
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    its the difference of squares formula a^2-b^2=(a-b)(a+b) here a=2x b=9

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