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togoodtobetrue4u

  • 3 years ago

I need help with this problem. If a * b = a2 -b 2. Find 3 * 2. ________ a + b

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  1. togoodtobetrue4u
    • 3 years ago
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    I' m attaching a file with 5 choices for this problem.

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  2. jim_thompson5910
    • 3 years ago
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    Hint: \[\Large a * b = \frac{a^2-b^2}{a+b}\] \[\Large 3 * 2 = \frac{3^2-2^2}{3+2}\]

  3. togoodtobetrue4u
    • 3 years ago
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    so it would be -2

  4. jim_thompson5910
    • 3 years ago
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    not quite

  5. togoodtobetrue4u
    • 3 years ago
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    2 then

  6. jim_thompson5910
    • 3 years ago
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    \[\Large 3 * 2 = \frac{3^2-2^2}{3+2}\] \[\Large 3 * 2 = \frac{9-4}{3+2}\] \[\Large 3 * 2 = \frac{5}{5}\] \[\Large 3 * 2 = 1\]

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