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A*L = 2600 ec. 2
Sustituyendo valores de la ec. 1 en la ec. 2:
A*(2A+60) = 2600
2A² + 60A -2600 = 0
A = {-60+-√(60²-4*2*-2600)} / 2*2
A = {-60+-√(3600+20800)} / 4
A = {-60 +- √24400) / 4
A = (-60+-156.2) / 4
A₁ = (-60 + 156.2)/4 = 96.2/4 = 24.05
De la ec. 2:
A*L = 2600
L = 2600/24.05
L = 108.108
El largo es aproximadamente de 108.108 cms
El ancho es aproximadamente de 24.05 cms.
Saludos.........