Respuesta :

pmart

A=35m2

L=3+2*W

35m2=L*W

35m2=(3+2W)*W

35=3*W+2*W^2

0=3*W+2*W^2-35

W1=7/2m

W2=-5 (can't be used since it's negative)

L=3+2*W

L=3+2*(7/2)

L=10m

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