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28 June, 10:53

The square below has an area of 64-16x+x^2 square meters.

What expression represents the length of one side of the square?

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  1. 28 June, 10:55
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    A=x^2-16x+64=

    x^2-2*8x+8^2=

    (x-8) ^2=l^2

    so l = x-8
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