123gato 123gato

18-03-2017
Mathematics

contestada

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?

Respuesta :

sadiq114 sadiq114

30-03-2017

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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