Question

The sqaure of 9 less than a number is 3 less than the number​

Answer 1

n: {7, 12}

Explanation:

(n - 9)^2 = n - 3, or

n² - 18n + 81 = n - 3

Rewriting this into the form of a quadratic, we get:

n² - 19n + 84 = 0, or

(n - 7)(n - 12) = 0

Then n: {7, 12}