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30 November, 18:23

The area, A, of a square is increasing at 3 cm2 per minute. How fast is the side length of the square changing when A=576cm2?

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  1. 30 November, 18:32
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    By modeling the above question we have,

    (x+3) ^2=576cm^2

    x^2+6x-567=0

    x1=21 and x2=-27.
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