Question

if the difference between the the square of a positive integer and itself 20 then find the positive integer​

Answer 1

Answer:

5

Step-by-step explanation:

Let the positive integer be x.

Given,

x² - x = 20

x² - x - 20 = 0

x² - 5x + 4x - 20 = 0

(x - 5)(x + 4) = 0

x = 5, -4

Given that, it is a positive integer.

Therefore, x = 5