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charlieberzak

  • 2 years ago

Solve the equation: 4x2 = 9

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  1. charlieberzak
    • 2 years ago
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    Answers: {-2, -3} {2/3, -2/3} {3/2, -3/2} no solution

  2. heyheyhelpme
    • 2 years ago
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    I would say {3/2, -3/2}

  3. katiebugg1997
    • 2 years ago
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    It's C. x=3/2 or x=-3/2

  4. heyheyhelpme
    • 2 years ago
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    Yeah I was right

  5. katiebugg1997
    • 2 years ago
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    4x² - 9 = 0 4x² - 9 = 0 write as difference of squares (2x - 3)² = 0 (2x)² - (3)² = 0 factor difference of squares 2x - 3 = 0 (2x - 3)(2x + 3) = 0 Set each factor = 0 & solve 2x = 3 2x - 3 = 0; 2x + 3 = 0 x = 3/2 2x = 3; 2x = -3 x = 3/2; x = -3/2 Correct solutions: 3/2 and -3/2

  6. charlieberzak
    • 2 years ago
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    thank youuu :))

  7. katiebugg1997
    • 2 years ago
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    You'reee Welcome:)

  8. heyheyhelpme
    • 2 years ago
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    Your welcome

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