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cwrw238

  • 3 years ago

Question from uk math challenge: How many distinct pairs (x,y) of real numbers satisfy the equation (x + y)^2 = (x + 4)(x - 4) A 0 B 1 C 2 D 3 E 4 I think its B.

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  1. cwrw238
    • 3 years ago
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    ooopps - sorry my error its (x + y)^2 = (x + 4)(y - 4)

  2. mukushla
    • 3 years ago
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    u think right

  3. cwrw238
    • 3 years ago
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    oh - i've assumed they mean real integers

  4. cwrw238
    • 3 years ago
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    -4 and 4 right?

  5. mukushla
    • 3 years ago
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    right

  6. cwrw238
    • 3 years ago
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    thanks

  7. mukushla
    • 3 years ago
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    np

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