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Alg 1

The product of two consecutive integers, n and n+1, is 42. What is the positive integer that satisfies the situation? Is it 6 x 7?

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Jane

  1. Your answer is correct. How did you get it?

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    rbowh

  2. That two consecutive numbers that multiply and equal 42 is 6x7. 6 + 1+7

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    Jane

  4. But, did you solve it using algebra?

    n(n + 1) = 42
    n^2 + n - 42 = 0
    ( n-6)(n+7) = 0
    n = 6 or n = -7
    n cannot = -7
    therefore n = 6 and n + 1 = 7

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    Rosemary

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