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Răspuns:
Explicație pas cu pas:
x^2 + 6x + 5 = x^2 + 5x + x + 5 = x(x + 5) + (x + 5) = (x + 5)(x + 1)
x^2 + 5x = x(x + 5)
fractia devine (x + 5)(x + 1)/x(x + 5) = (x + 1)/x