What is the positive solution to the quadratic function x² - 4x = 0?

x = 4

Step-by-step explanation:

from the given expression, factorise to have;

x (x - 4) = 0

Thus, X = 0 or x - 4 = 0

x - 4 = 0

x = 4

Thus, x = 0 or x = 4

Therefore the positive solution to the quadratic function is 4.