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Summer Clouds moderators

07/08/2017 at 08:53
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If x + y = 7 and x − y = 1, what is the value of the product x.y?




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    Lê Quốc Trần Anh Coordinator 07/08/2017 at 08:56

    x + y = 7 and x - y = 1.

    => x = 4 and y = 3.

    => The product of x.y is: \(4.3=12\)

    So the answer is: \(12\)

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