What mathematical operation always results in positive number

"Multiplying a number by a positive integer always results in a bigger number." "Multiplying a number by a positive integer always results in a bigger number."

Absolute value

Step-by-step explanation:

The absolute value always results in a plus result.

abs (-4) = 4

abs (4) = 4

Even if it is more complicated like

abs (x^3 - 7)

Let x = - 2

abs ((-2) ^3 - 7)

abs ( - 8 - 7)

abs (-15)

15