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13 December, 02:01

Find two numbers a a and b b whose sum a + b a+b is 0 and whose difference a - b a-b is 2. your answer is

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  1. 13 December, 03:26
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    The two numbers are a and b.

    Because their sum is 0, therefore

    a + b = 0 (1)

    Because their difference is 2, therefore

    a - b = 2 (2)

    Add (1) and (2).

    a + b + (a - b) = 0 + 2

    2a = 2

    a = 1

    From (1), obtain

    1 + b = 0

    b = - 1

    Answer:

    a = 1

    b = - 1
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