Respuesta :

Answer:

The number is 5.

Step-by-step explanation:

represent as

x + (-x)^2 = 30

x + x^2 = 30

x^2 + x - 30 = 0

(x - 5)(x + 6) = 0

x = 5, x = -6

since the number has to be positive, it would be x = 5

check:

5 + 5^2 = 30

5 + 25 = 30

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