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Area = x*x
A = x²
se le aumenta en 5
Lado del cuadrado = x +5
Area = (x +5)(x+5)
A = ( x +5)²
( x +5)² = x² +121
x² +10x +25 = x² +121
x² +10x -x² = 121 -25
10x = 96
x = 96/10
x = 9,6
La longitud del lado inicial del cuadrado es de 9,6cm